20313297 has 12 divisors (see below), whose sum is σ = 29427840. Its totient is φ = 13502328.

The previous prime is 20313281. The next prime is 20313343. The reversal of 20313297 is 79231302.

It is not a de Polignac number, because 20313297 - 2⁴ = 20313281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20313297.

It is not an unprimeable number, because it can be changed into a prime (20313247) 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, 88 + ... + 6374.

It is an arithmetic number, because the mean of its divisors is an integer number (2452320).

Almost surely, 2^20313297 is an apocalyptic number.

It is an amenable number.

20313297 is a deficient number, since it is larger than the sum of its proper divisors (9114543).

20313297 is a wasteful number, since it uses less digits than its factorization.

20313297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6652 (or 6649 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 20313297 is about 4507.0275126740. The cubic root of 20313297 is about 272.8517892935.

Adding to 20313297 its reverse (79231302), we get a palindrome (99544599).

The spelling of 20313297 in words is "twenty million, three hundred thirteen thousand, two hundred ninety-seven".