20495313 has 12 divisors (see below), whose sum is σ = 29649360. Its totient is φ = 13642776.

The previous prime is 20495303. The next prime is 20495317. The reversal of 20495313 is 31359402.

It is not a de Polignac number, because 20495313 - 2¹⁴ = 20478929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20495317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6658 + ... + 9236.

It is an arithmetic number, because the mean of its divisors is an integer number (2470780).

Almost surely, 2^20495313 is an apocalyptic number.

It is an amenable number.

20495313 is a deficient number, since it is larger than the sum of its proper divisors (9154047).

20495313 is a wasteful number, since it uses less digits than its factorization.

20495313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468 (or 3465 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20495313 is about 4527.1749469178. The cubic root of 20495313 is about 273.6643242240.

The spelling of 20495313 in words is "twenty million, four hundred ninety-five thousand, three hundred thirteen".