20455072 has 24 divisors (see below), whose sum is σ = 43932672. Its totient is φ = 9297600.

The previous prime is 20455051. The next prime is 20455081. The reversal of 20455072 is 27055402.

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, 28704 + ... + 29407.

It is an arithmetic number, because the mean of its divisors is an integer number (1830528).

Almost surely, 2^20455072 is an apocalyptic number.

20455072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20455072 is the 2418-th centered heptagonal number.

It is an amenable number.

20455072 is an abundant number, since it is smaller than the sum of its proper divisors (23477600).

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

20455072 is a wasteful number, since it uses less digits than its factorization.

20455072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58132 (or 58124 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20455072 is about 4522.7283800821. The cubic root of 20455072 is about 273.4851004609.

It can be divided in two parts, 2045 and 5072, that added together give a palindrome (7117).

The spelling of 20455072 in words is "twenty million, four hundred fifty-five thousand, seventy-two".