20073564 has 36 divisors (see below), whose sum is σ = 57991024. Its totient is φ = 5735232.

The previous prime is 20073563. The next prime is 20073577. The reversal of 20073564 is 46537002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20073563) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 39577 + ... + 40080.

Almost surely, 2^20073564 is an apocalyptic number.

It is an amenable number.

20073564 is an abundant number, since it is smaller than the sum of its proper divisors (37917460).

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

20073564 is a wasteful number, since it uses less digits than its factorization.

20073564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79674 (or 79669 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20073564 is about 4480.3531110840. The cubic root of 20073564 is about 271.7741601452.

The spelling of 20073564 in words is "twenty million, seventy-three thousand, five hundred sixty-four".