20972395 has 8 divisors (see below), whose sum is σ = 25322256. Its totient is φ = 16674336.

The previous prime is 20972383. The next prime is 20972417. The reversal of 20972395 is 59327902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20972395 - 2⁷ = 20972267 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12052 + ... + 13681.

It is an arithmetic number, because the mean of its divisors is an integer number (3165282).

Almost surely, 2^20972395 is an apocalyptic number.

20972395 is a deficient number, since it is larger than the sum of its proper divisors (4349861).

20972395 is a wasteful number, since it uses less digits than its factorization.

20972395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25901.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 20972395 is about 4579.5627520540. The cubic root of 20972395 is about 275.7714755783.

The spelling of 20972395 in words is "twenty million, nine hundred seventy-two thousand, three hundred ninety-five".