20295564 has 12 divisors (see below), whose sum is σ = 47356344. Its totient is φ = 6765184.

The previous prime is 20295559. The next prime is 20295571. The reversal of 20295564 is 46559202.

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

It is a super-4 number, since 4×20295564⁴ (a number of 30 digits) contains 4444 as substring.

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, 845637 + ... + 845660.

It is an arithmetic number, because the mean of its divisors is an integer number (3946362).

Almost surely, 2^20295564 is an apocalyptic number.

It is an amenable number.

20295564 is an abundant number, since it is smaller than the sum of its proper divisors (27060780).

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

20295564 is a wasteful number, since it uses less digits than its factorization.

20295564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691304 (or 1691302 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 20295564 is about 4505.0598220223. The cubic root of 20295564 is about 272.7723685833.

The spelling of 20295564 in words is "twenty million, two hundred ninety-five thousand, five hundred sixty-four".