20416764 has 12 divisors (see below), whose sum is σ = 47639144. Its totient is φ = 6805584.

The previous prime is 20416741. The next prime is 20416771. The reversal of 20416764 is 46761402.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 850687 + ... + 850710.

Almost surely, 2^20416764 is an apocalyptic number.

It is an amenable number.

20416764 is an abundant number, since it is smaller than the sum of its proper divisors (27222380).

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

20416764 is a wasteful number, since it uses less digits than its factorization.

20416764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701404 (or 1701402 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20416764 is about 4518.4913411447. The cubic root of 20416764 is about 273.3142672933.

The spelling of 20416764 in words is "twenty million, four hundred sixteen thousand, seven hundred sixty-four".