20295457 has 24 divisors (see below), whose sum is σ = 25714752. Its totient is φ = 15876000.

The previous prime is 20295427. The next prime is 20295479. The reversal of 20295457 is 75459202.

It is not a de Polignac number, because 20295457 - 2⁷ = 20295329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20295427) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 96082 + ... + 96292.

It is an arithmetic number, because the mean of its divisors is an integer number (1071448).

Almost surely, 2^20295457 is an apocalyptic number.

It is an amenable number.

20295457 is a deficient number, since it is larger than the sum of its proper divisors (5419295).

20295457 is a wasteful number, since it uses less digits than its factorization.

20295457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 382 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 20295457 is about 4505.0479464707. The cubic root of 20295457 is about 272.7718892225.

It can be divided in two parts, 202 and 95457, that added together give a palindrome (95659).

The spelling of 20295457 in words is "twenty million, two hundred ninety-five thousand, four hundred fifty-seven".