20504514400 has 36 divisors (see below), whose sum is σ = 50056647732. Its totient is φ = 8201805440.

The previous prime is 20504514391. The next prime is 20504514427. The reversal of 20504514400 is 441540502.

It is a happy number.

It is a super-2 number, since 2×20504514400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

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, 12814522 + ... + 12816121.

It is an arithmetic number, because the mean of its divisors is an integer number (1390462437).

Almost surely, 2^20504514400 is an apocalyptic number.

20504514400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20504514400 is an abundant number, since it is smaller than the sum of its proper divisors (29552133332).

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

20504514400 is a wasteful number, since it uses less digits than its factorization.

20504514400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25630663 (or 25630650 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The spelling of 20504514400 in words is "twenty billion, five hundred four million, five hundred fourteen thousand, four hundred".