20516884 has 24 divisors (see below), whose sum is σ = 37940000. Its totient is φ = 9681120.

The previous prime is 20516861. The next prime is 20516887. The reversal of 20516884 is 48861502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37654 + ... + 38194.

Almost surely, 2^20516884 is an apocalyptic number.

It is an amenable number.

20516884 is a deficient number, since it is larger than the sum of its proper divisors (17423116).

20516884 is a wasteful number, since it uses less digits than its factorization.

20516884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 20516884 is about 4529.5567112025. The cubic root of 20516884 is about 273.7602997174.

The spelling of 20516884 in words is "twenty million, five hundred sixteen thousand, eight hundred eighty-four".