20081955544 has 16 divisors (see below), whose sum is σ = 43032762000. Its totient is φ = 8606552352.

The previous prime is 20081955539. The next prime is 20081955557. The reversal of 20081955544 is 44555918002.

It is a self number, because there is not a number n which added to its sum of digits gives 20081955544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179303119 + ... + 179303230.

It is an arithmetic number, because the mean of its divisors is an integer number (2689547625).

Almost surely, 2^20081955544 is an apocalyptic number.

It is an amenable number.

20081955544 is an abundant number, since it is smaller than the sum of its proper divisors (22950806456).

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

20081955544 is a wasteful number, since it uses less digits than its factorization.

20081955544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358606362 (or 358606358 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 20081955544 in words is "twenty billion, eighty-one million, nine hundred fifty-five thousand, five hundred forty-four".