23100031020 has 96 divisors (see below), whose sum is σ = 70894930176. Its totient is φ = 5573433600.

The previous prime is 23100030971. The next prime is 23100031027. The reversal of 23100031020 is 2013000132.

It is a happy number.

It is a super-2 number, since 2×23100031020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 23100030987 and 23100031005.

It is not an unprimeable number, because it can be changed into a prime (23100031027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56322 + ... + 222198.

It is an arithmetic number, because the mean of its divisors is an integer number (738488856).

Almost surely, 2^23100031020 is an apocalyptic number.

23100031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23100031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35447465088).

23100031020 is an abundant number, since it is smaller than the sum of its proper divisors (47794899156).

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

23100031020 is a wasteful number, since it uses less digits than its factorization.

23100031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166111 (or 166109 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 23100031020 its reverse (2013000132), we get a palindrome (25113031152).

The spelling of 23100031020 in words is "twenty-three billion, one hundred million, thirty-one thousand, twenty".