20455522734172 has 24 divisors (see below), whose sum is σ = 35820545760272. Its totient is φ = 10221081552000.

The previous prime is 20455522734137. The next prime is 20455522734173. The reversal of 20455522734172 is 27143722555402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20455522734173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302334547 + ... + 302402197.

Almost surely, 2^{20455522734172} is an apocalyptic number.

It is an amenable number.

20455522734172 is a deficient number, since it is larger than the sum of its proper divisors (15365023026100).

20455522734172 is a wasteful number, since it uses less digits than its factorization.

20455522734172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115909 (or 115907 counting only the distinct ones).

The product of its (nonzero) digits is 4704000, while the sum is 49.

The spelling of 20455522734172 in words is "twenty trillion, four hundred fifty-five billion, five hundred twenty-two million, seven hundred thirty-four thousand, one hundred seventy-two".