23100020 has 12 divisors (see below), whose sum is σ = 48510084. Its totient is φ = 9240000.

The previous prime is 23100017. The next prime is 23100031. The reversal of 23100020 is 2000132.

It can be written as a sum of positive squares in 2 ways, for example, as 5071504 + 18028516 = 2252^2 + 4246^2 .

It is a super-2 number, since 2×23100020² = 1067221848000800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23099980 and 23100007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577481 + ... + 577520.

It is an arithmetic number, because the mean of its divisors is an integer number (4042507).

Almost surely, 2^23100020 is an apocalyptic number.

23100020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23100020 is an abundant number, since it is smaller than the sum of its proper divisors (25410064).

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

23100020 is a wasteful number, since it uses less digits than its factorization.

23100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155010 (or 1155008 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 23100020 is about 4806.2480169047. The cubic root of 23100020 is about 284.7983389258.

Adding to 23100020 its reverse (2000132), we get a palindrome (25100152).

The spelling of 23100020 in words is "twenty-three million, one hundred thousand, twenty".