20295644 has 12 divisors (see below), whose sum is σ = 35548968. Its totient is φ = 10138800.

The previous prime is 20295631. The next prime is 20295673. The reversal of 20295644 is 44659202.

It is a self number, because there is not a number n which added to its sum of digits gives 20295644.

It is a congruent number.

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, 7334 + ... + 9714.

It is an arithmetic number, because the mean of its divisors is an integer number (2962414).

Almost surely, 2^20295644 is an apocalyptic number.

It is an amenable number.

20295644 is a deficient number, since it is larger than the sum of its proper divisors (15253324).

20295644 is a wasteful number, since it uses less digits than its factorization.

20295644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516 (or 4514 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20295644 is about 4505.0687009190. The cubic root of 20295644 is about 272.7727269828.

The spelling of 20295644 in words is "twenty million, two hundred ninety-five thousand, six hundred forty-four".