20113203400 has 24 divisors (see below), whose sum is σ = 46763198370. Its totient is φ = 8045281280.

The previous prime is 20113203391. The next prime is 20113203413. The reversal of 20113203400 is 430231102.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16543618884 + 3569584516 = 128622^2 + 59746^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50282809 + ... + 50283208.

Almost surely, 2^20113203400 is an apocalyptic number.

20113203400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20113203400 is an abundant number, since it is smaller than the sum of its proper divisors (26649994970).

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

20113203400 is a wasteful number, since it uses less digits than its factorization.

20113203400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100566033 (or 100566024 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20113203400 its reverse (430231102), we get a palindrome (20543434502).

The spelling of 20113203400 in words is "twenty billion, one hundred thirteen million, two hundred three thousand, four hundred".