20940075400 has 48 divisors (see below), whose sum is σ = 48938022900. Its totient is φ = 8332615680.

The previous prime is 20940075383. The next prime is 20940075407. The reversal of 20940075400 is 457004902.

It can be written as a sum of positive squares in 6 ways, for example, as 4927197636 + 16012877764 = 70194^2 + 126542^2 .

It is not an unprimeable number, because it can be changed into a prime (20940075407) 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, 232645 + ... + 309844.

Almost surely, 2^20940075400 is an apocalyptic number.

20940075400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20940075400 is an abundant number, since it is smaller than the sum of its proper divisors (27997947500).

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

20940075400 is a wasteful number, since it uses less digits than its factorization.

20940075400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542698 (or 542689 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 20940075400 in words is "twenty billion, nine hundred forty million, seventy-five thousand, four hundred".