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20232001031 = 117166139191
BaseRepresentation
bin10010110101111010…
…111101011000000111
31221020000002010211112
4102311322331120013
5312413343013111
613143333555235
71314240112514
oct226572753007
957200063745
1020232001031
118642489910
123b077a5b1b
131ba5787958
14d9d03830b
157d62e6e8b
hex4b5ebd607

20232001031 has 16 divisors (see below), whose sum is σ = 22416569856. Its totient is φ = 18105780000.

The previous prime is 20232000977. The next prime is 20232001033. The reversal of 20232001031 is 13010023202.

It is a happy number.

It is not a de Polignac number, because 20232001031 - 234 = 3052131847 is a prime.

It is a super-2 number, since 2×202320010312 (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20232000997 and 20232001015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20232001033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496646 + ... + 535836.

It is an arithmetic number, because the mean of its divisors is an integer number (1401035616).

Almost surely, 220232001031 is an apocalyptic number.

20232001031 is a deficient number, since it is larger than the sum of its proper divisors (2184568825).

20232001031 is a wasteful number, since it uses less digits than its factorization.

20232001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39934.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20232001031 its reverse (13010023202), we get a palindrome (33242024233).

The spelling of 20232001031 in words is "twenty billion, two hundred thirty-two million, one thousand, thirty-one".

Divisors: 1 11 71 661 781 7271 39191 46931 431101 516241 2782561 25905251 30608171 284957761 1839272821 20232001031