20455544188 has 12 divisors (see below), whose sum is σ = 35813437632. Its totient is φ = 10223133440.

The previous prime is 20455544171. The next prime is 20455544237. The reversal of 20455544188 is 88144555402.

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, 1149733 + ... + 1167388.

It is an arithmetic number, because the mean of its divisors is an integer number (2984453136).

Almost surely, 2^20455544188 is an apocalyptic number.

It is an amenable number.

20455544188 is a deficient number, since it is larger than the sum of its proper divisors (15357893444).

20455544188 is a wasteful number, since it uses less digits than its factorization.

20455544188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319332 (or 2319330 counting only the distinct ones).

The product of its (nonzero) digits is 1024000, while the sum is 46.

The spelling of 20455544188 in words is "twenty billion, four hundred fifty-five million, five hundred forty-four thousand, one hundred eighty-eight".