20553522400 has 72 divisors (see below), whose sum is σ = 50780984184. Its totient is φ = 8122329600.

The previous prime is 20553522371. The next prime is 20553522413. The reversal of 20553522400 is 422535502.

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, 88371 + ... + 221170.

It is an arithmetic number, because the mean of its divisors is an integer number (705291447).

Almost surely, 2^20553522400 is an apocalyptic number.

20553522400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20553522400 is an abundant number, since it is smaller than the sum of its proper divisors (30227461784).

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

20553522400 is a wasteful number, since it uses less digits than its factorization.

20553522400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309644 (or 309631 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The spelling of 20553522400 in words is "twenty billion, five hundred fifty-three million, five hundred twenty-two thousand, four hundred".