20554481885 has 32 divisors (see below), whose sum is σ = 28937149440. Its totient is φ = 13725324288.

The previous prime is 20554481881. The next prime is 20554481887. The reversal of 20554481885 is 58818445502.

It is a cyclic number.

It is not a de Polignac number, because 20554481885 - 2² = 20554481881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554481881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 150929 + ... + 252761.

It is an arithmetic number, because the mean of its divisors is an integer number (904285920).

Almost surely, 2^20554481885 is an apocalyptic number.

It is an amenable number.

20554481885 is a deficient number, since it is larger than the sum of its proper divisors (8382667555).

20554481885 is a wasteful number, since it uses less digits than its factorization.

20554481885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101997.

The product of its (nonzero) digits is 2048000, while the sum is 50.

The spelling of 20554481885 in words is "twenty billion, five hundred fifty-four million, four hundred eighty-one thousand, eight hundred eighty-five".