20553850164 has 24 divisors (see below), whose sum is σ = 48115210528. Its totient is φ = 6828965280.

The previous prime is 20553850133. The next prime is 20553850217. The reversal of 20553850164 is 46105835502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2785927 + ... + 2793294.

Almost surely, 2^20553850164 is an apocalyptic number.

It is an amenable number.

20553850164 is an abundant number, since it is smaller than the sum of its proper divisors (27561360364).

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

20553850164 is a wasteful number, since it uses less digits than its factorization.

20553850164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579535 (or 5579533 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 20553850164 in words is "twenty billion, five hundred fifty-three million, eight hundred fifty thousand, one hundred sixty-four".