20455255320 has 32 divisors (see below), whose sum is σ = 61365766320. Its totient is φ = 5454734720.

The previous prime is 20455255313. The next prime is 20455255333. The reversal of 20455255320 is 2355255402.

It is a congruent number.

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, 85230111 + ... + 85230350.

Almost surely, 2^20455255320 is an apocalyptic number.

20455255320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20455255320 is an abundant number, since it is smaller than the sum of its proper divisors (40910511000).

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

20455255320 is a wasteful number, since it uses less digits than its factorization.

20455255320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170460475 (or 170460471 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 33.

The spelling of 20455255320 in words is "twenty billion, four hundred fifty-five million, two hundred fifty-five thousand, three hundred twenty".