20464416 has 72 divisors (see below), whose sum is σ = 66515904. Its totient is φ = 5846400.

The previous prime is 20464391. The next prime is 20464417. The reversal of 20464416 is 61446402.

20464416 is a `hidden beast` number, since 2 + 0 + 4 + 644 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 20464416.

It is not an unprimeable number, because it can be changed into a prime (20464417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3060 + ... + 7091.

It is an arithmetic number, because the mean of its divisors is an integer number (923832).

Almost surely, 2^20464416 is an apocalyptic number.

It is an amenable number.

20464416 is an abundant number, since it is smaller than the sum of its proper divisors (46051488).

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

20464416 is a wasteful number, since it uses less digits than its factorization.

20464416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10174 (or 10163 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20464416 is about 4523.7612669105. The cubic root of 20464416 is about 273.5267373349.

It can be divided in two parts, 204 and 64416, that added together give a triangular number (64620 = T₃₅₉).

The spelling of 20464416 in words is "twenty million, four hundred sixty-four thousand, four hundred sixteen".