20313693 has 8 divisors (see below), whose sum is σ = 30094400. Its totient is φ = 13542444.

The previous prime is 20313661. The next prime is 20313697. The reversal of 20313693 is 39631302.

It is not a de Polignac number, because 20313693 - 2⁵ = 20313661 is a prime.

It is a super-2 number, since 2×20313693² = 825292246596498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 752359 = 20313693 / (2 + 0 + 3 + 1 + 3 + 6 + 9 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20313697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 376153 + ... + 376206.

It is an arithmetic number, because the mean of its divisors is an integer number (3761800).

Almost surely, 2^20313693 is an apocalyptic number.

It is an amenable number.

20313693 is a deficient number, since it is larger than the sum of its proper divisors (9780707).

20313693 is an equidigital number, since it uses as much as digits as its factorization.

20313693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752368 (or 752362 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The square root of 20313693 is about 4507.0714438535. The cubic root of 20313693 is about 272.8535623293.

Adding to 20313693 its reverse (39631302), we get a palindrome (59944995).

The spelling of 20313693 in words is "twenty million, three hundred thirteen thousand, six hundred ninety-three".