20554553442 has 16 divisors (see below), whose sum is σ = 41134675680. Its totient is φ = 6847256352.

The previous prime is 20554553407. The next prime is 20554553479. The reversal of 20554553442 is 24435545502.

It is a self number, because there is not a number n which added to its sum of digits gives 20554553442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1054908 + ... + 1074215.

It is an arithmetic number, because the mean of its divisors is an integer number (2570917230).

Almost surely, 2^20554553442 is an apocalyptic number.

20554553442 is an abundant number, since it is smaller than the sum of its proper divisors (20580122238).

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

20554553442 is a wasteful number, since it uses less digits than its factorization.

20554553442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130737.

The product of its (nonzero) digits is 480000, while the sum is 39.

The spelling of 20554553442 in words is "twenty billion, five hundred fifty-four million, five hundred fifty-three thousand, four hundred forty-two".