20455776 has 108 divisors (see below), whose sum is σ = 64049076. Its totient is φ = 6188160.

The previous prime is 20455711. The next prime is 20455823. The reversal of 20455776 is 67755402.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20455776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34555 + ... + 35141.

It is an arithmetic number, because the mean of its divisors is an integer number (593047).

Almost surely, 2^20455776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20455776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32024538).

20455776 is an abundant number, since it is smaller than the sum of its proper divisors (43593300).

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

20455776 is a wasteful number, since it uses less digits than its factorization.

20455776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 20455776 is about 4522.8062085391. The cubic root of 20455776 is about 273.4882379273.

The spelling of 20455776 in words is "twenty million, four hundred fifty-five thousand, seven hundred seventy-six".