20995315 has 12 divisors (see below), whose sum is σ = 27693792. Its totient is φ = 15268880.

The previous prime is 20995307. The next prime is 20995349. The reversal of 20995315 is 51359902.

It is a happy number.

It is not a de Polignac number, because 20995315 - 2³ = 20995307 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16747 + ... + 17956.

It is an arithmetic number, because the mean of its divisors is an integer number (2307816).

Almost surely, 2^20995315 is an apocalyptic number.

20995315 is a deficient number, since it is larger than the sum of its proper divisors (6698477).

20995315 is a wasteful number, since it uses less digits than its factorization.

20995315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34730 (or 34719 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 20995315 is about 4582.0644910346. The cubic root of 20995315 is about 275.8718993507.

The spelling of 20995315 in words is "twenty million, nine hundred ninety-five thousand, three hundred fifteen".