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20122123 = 72874589
BaseRepresentation
bin100110011000…
…0101000001011
31101212022100211
41030300220023
520122401443
61555141551
7333015040
oct114605013
941768324
1020122123
11103a405a
1268a48b7
134226ba8
14295b1c7
151b7719d
hex1330a0b

20122123 has 4 divisors (see below), whose sum is σ = 22996720. Its totient is φ = 17247528.

The previous prime is 20122093. The next prime is 20122133. The reversal of 20122123 is 32122102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32122102 = 216061051.

It is a cyclic number.

It is not a de Polignac number, because 20122123 - 217 = 19991051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437288 + ... + 1437301.

It is an arithmetic number, because the mean of its divisors is an integer number (5749180).

Almost surely, 220122123 is an apocalyptic number.

20122123 is a deficient number, since it is larger than the sum of its proper divisors (2874597).

20122123 is an equidigital number, since it uses as much as digits as its factorization.

20122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2874596.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20122123 is about 4485.7689418872. The cubic root of 20122123 is about 271.9931289715.

Adding to 20122123 its reverse (32122102), we get a palindrome (52244225).

The spelling of 20122123 in words is "twenty million, one hundred twenty-two thousand, one hundred twenty-three".

Divisors: 1 7 2874589 20122123