20554660626 has 16 divisors (see below), whose sum is σ = 42111988128. Its totient is φ = 6684442400.

The previous prime is 20554660619. The next prime is 20554660649. The reversal of 20554660626 is 62606645502.

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, 41777520 + ... + 41778011.

It is an arithmetic number, because the mean of its divisors is an integer number (2631999258).

Almost surely, 2^20554660626 is an apocalyptic number.

20554660626 is an abundant number, since it is smaller than the sum of its proper divisors (21557327502).

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

20554660626 is a wasteful number, since it uses less digits than its factorization.

20554660626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83555577.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 20554660626 in words is "twenty billion, five hundred fifty-four million, six hundred sixty thousand, six hundred twenty-six".