20113123200 has 96 divisors (see below), whose sum is σ = 66247631160. Its totient is φ = 5363496960.

The previous prime is 20113123157. The next prime is 20113123201. The reversal of 20113123200 is 232131102.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20113123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113123201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1037959 + ... + 1057158.

Almost surely, 2^20113123200 is an apocalyptic number.

20113123200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113123200 is an abundant number, since it is smaller than the sum of its proper divisors (46134507960).

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

20113123200 is a wasteful number, since it uses less digits than its factorization.

20113123200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095144 (or 2095127 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20113123200 its reverse (232131102), we get a palindrome (20345254302).

The spelling of 20113123200 in words is "twenty billion, one hundred thirteen million, one hundred twenty-three thousand, two hundred".