20472895 has 4 divisors (see below), whose sum is σ = 24567480. Its totient is φ = 16378312.

The previous prime is 20472889. The next prime is 20472901. The reversal of 20472895 is 59827402.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20472889) and next prime (20472901).

It is a cyclic number.

It is not a de Polignac number, because 20472895 - 2³ = 20472887 is a prime.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 2047285 + ... + 2047294.

It is an arithmetic number, because the mean of its divisors is an integer number (6141870).

Almost surely, 2^20472895 is an apocalyptic number.

20472895 is a deficient number, since it is larger than the sum of its proper divisors (4094585).

20472895 is an equidigital number, since it uses as much as digits as its factorization.

20472895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094584.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 20472895 is about 4524.6983324858. The cubic root of 20472895 is about 273.5645088007.

The spelling of 20472895 in words is "twenty million, four hundred seventy-two thousand, eight hundred ninety-five".