20631795 has 16 divisors (see below), whose sum is σ = 34953120. Its totient is φ = 10356224.

The previous prime is 20631781. The next prime is 20631797. The reversal of 20631795 is 59713602.

It is a cyclic number.

It is not a de Polignac number, because 20631795 - 2⁵ = 20631763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20631797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40200 + ... + 40709.

It is an arithmetic number, because the mean of its divisors is an integer number (2184570).

Almost surely, 2^20631795 is an apocalyptic number.

20631795 is a deficient number, since it is larger than the sum of its proper divisors (14321325).

20631795 is a wasteful number, since it uses less digits than its factorization.

20631795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80934.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 20631795 is about 4542.2235744182. The cubic root of 20631795 is about 274.2704408890.

The spelling of 20631795 in words is "twenty million, six hundred thirty-one thousand, seven hundred ninety-five".