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23012130312 = 2332319612921
BaseRepresentation
bin10101011011101000…
…010011111000001000
32012101202101100020200
4111123220103320020
5334112101132222
614323245452200
71443155610633
oct253350237010
965352340220
1023012130312
119839825116
124562871060
132229748572
141184368c1a
158ea408eac
hex55ba13e08

23012130312 has 24 divisors (see below), whose sum is σ = 62324519790. Its totient is φ = 7670710080.

The previous prime is 23012130293. The next prime is 23012130341. The reversal of 23012130312 is 21303121032.

23012130312 is a `hidden beast` number, since 2 + 301 + 21 + 30 + 312 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15558570756 + 7453559556 = 124734^2 + 86334^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159806389 + ... + 159806532.

Almost surely, 223012130312 is an apocalyptic number.

It is an amenable number.

23012130312 is an abundant number, since it is smaller than the sum of its proper divisors (39312389478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23012130312 is a wasteful number, since it uses less digits than its factorization.

23012130312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319612933 (or 319612926 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23012130312 its reverse (21303121032), we get a palindrome (44315251344).

The spelling of 23012130312 in words is "twenty-three billion, twelve million, one hundred thirty thousand, three hundred twelve".

Divisors: 1 2 3 4 6 8 9 12 18 24 36 72 319612921 639225842 958838763 1278451684 1917677526 2556903368 2876516289 3835355052 5753032578 7670710104 11506065156 23012130312