20612313 has 20 divisors (see below), whose sum is σ = 32604660. Its totient is φ = 12932352.

The previous prime is 20612269. The next prime is 20612341. The reversal of 20612313 is 31321602.

20612313 is a `hidden beast` number, since 20 + 612 + 31 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5774409 + 14837904 = 2403^2 + 3852^2 .

It is not a de Polignac number, because 20612313 - 2¹⁴ = 20595929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20612413) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6108 + ... + 8861.

It is an arithmetic number, because the mean of its divisors is an integer number (1630233).

Almost surely, 2^20612313 is an apocalyptic number.

It is an amenable number.

20612313 is a deficient number, since it is larger than the sum of its proper divisors (11992347).

20612313 is a wasteful number, since it uses less digits than its factorization.

20612313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14998 (or 14989 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 20612313 is about 4540.0785235500. The cubic root of 20612313 is about 274.1840851864.

Adding to 20612313 its reverse (31321602), we get a palindrome (51933915).

The spelling of 20612313 in words is "twenty million, six hundred twelve thousand, three hundred thirteen".