20164512 has 48 divisors (see below), whose sum is σ = 54764640. Its totient is φ = 6488832.

The previous prime is 20164493. The next prime is 20164523. The reversal of 20164512 is 21546102.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838 + ... + 6405.

It is an arithmetic number, because the mean of its divisors is an integer number (1140930).

Almost surely, 2^20164512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20164512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27382320).

20164512 is an abundant number, since it is smaller than the sum of its proper divisors (34600128).

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

20164512 is a wasteful number, since it uses less digits than its factorization.

20164512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7285 (or 7277 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20164512 is about 4490.4912871533. The cubic root of 20164512 is about 272.1839873984.

The spelling of 20164512 in words is "twenty million, one hundred sixty-four thousand, five hundred twelve".