23123100020 has 12 divisors (see below), whose sum is σ = 48558510084. Its totient is φ = 9249240000.

The previous prime is 23123100019. The next prime is 23123100023. The reversal of 23123100020 is 2000132132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8693324644 + 14429775376 = 93238^2 + 120124^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23123099968 and 23123100004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123100023) 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, 578077481 + ... + 578077520.

It is an arithmetic number, because the mean of its divisors is an integer number (4046542507).

Almost surely, 2^23123100020 is an apocalyptic number.

23123100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23123100020 is an abundant number, since it is smaller than the sum of its proper divisors (25435410064).

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

23123100020 is a wasteful number, since it uses less digits than its factorization.

23123100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156155010 (or 1156155008 counting only the distinct ones).

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

Adding to 23123100020 its reverse (2000132132), we get a palindrome (25123232152).

The spelling of 23123100020 in words is "twenty-three billion, one hundred twenty-three million, one hundred thousand, twenty".