20212131400 has 48 divisors (see below), whose sum is σ = 47521260900. Its totient is φ = 7994004480.

The previous prime is 20212131389. The next prime is 20212131427. The reversal of 20212131400 is 413121202.

It can be written as a sum of positive squares in 6 ways, for example, as 705539844 + 19506591556 = 26562^2 + 139666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 549957 + ... + 585556.

Almost surely, 2^20212131400 is an apocalyptic number.

20212131400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212131400 is an abundant number, since it is smaller than the sum of its proper divisors (27309129500).

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

20212131400 is a wasteful number, since it uses less digits than its factorization.

20212131400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135618 (or 1135609 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20212131400 its reverse (413121202), we get a palindrome (20625252602).

The spelling of 20212131400 in words is "twenty billion, two hundred twelve million, one hundred thirty-one thousand, four hundred".