20164816 has 20 divisors (see below), whose sum is σ = 44650912. Its totient is φ = 8642016.

The previous prime is 20164783. The next prime is 20164847. The reversal of 20164816 is 61846102.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89910 + ... + 90133.

Almost surely, 2^20164816 is an apocalyptic number.

It is an amenable number.

20164816 is an abundant number, since it is smaller than the sum of its proper divisors (24486096).

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

20164816 is a wasteful number, since it uses less digits than its factorization.

20164816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180058 (or 180052 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 20164816 is about 4490.5251363287. The cubic root of 20164816 is about 272.1853552060.

It can be divided in two parts, 20 and 164816, that added together give a square (164836 = 406²).

The spelling of 20164816 in words is "twenty million, one hundred sixty-four thousand, eight hundred sixteen".