19520864 has 24 divisors (see below), whose sum is σ = 41926248. Its totient is φ = 8872960.

The previous prime is 19520861. The next prime is 19520881. The reversal of 19520864 is 46802591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19520861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27377 + ... + 28080.

It is an arithmetic number, because the mean of its divisors is an integer number (1746927).

Almost surely, 2^19520864 is an apocalyptic number.

It is an amenable number.

19520864 is an abundant number, since it is smaller than the sum of its proper divisors (22405384).

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

19520864 is a wasteful number, since it uses less digits than its factorization.

19520864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55478 (or 55470 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 19520864 is about 4418.2421843987. The cubic root of 19520864 is about 269.2565924116.

The spelling of 19520864 in words is "nineteen million, five hundred twenty thousand, eight hundred sixty-four".