20503150400 has 84 divisors (see below), whose sum is σ = 51814242828. Its totient is φ = 7979581440.

The previous prime is 20503150391. The next prime is 20503150487. The reversal of 20503150400 is 405130502.

It can be written as a sum of positive squares in 6 ways, for example, as 522762496 + 19980387904 = 22864^2 + 141352^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 113969 + ... + 232368.

Almost surely, 2^20503150400 is an apocalyptic number.

20503150400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20503150400 is an abundant number, since it is smaller than the sum of its proper divisors (31311092428).

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

20503150400 is a wasteful number, since it uses less digits than its factorization.

20503150400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346396 (or 346381 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 20503150400 its reverse (405130502), we get a palindrome (20908280902).

The spelling of 20503150400 in words is "twenty billion, five hundred three million, one hundred fifty thousand, four hundred".