20308707 has 12 divisors (see below), whose sum is σ = 29610360. Its totient is φ = 13411968.

The previous prime is 20308681. The next prime is 20308723. The reversal of 20308707 is 70780302.

It is not a de Polignac number, because 20308707 - 2¹⁹ = 19784419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20308507) 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, 9582 + ... + 11507.

It is an arithmetic number, because the mean of its divisors is an integer number (2467530).

Almost surely, 2^20308707 is an apocalyptic number.

20308707 is a deficient number, since it is larger than the sum of its proper divisors (9301653).

20308707 is a wasteful number, since it uses less digits than its factorization.

20308707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21202 (or 21199 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20308707 is about 4506.5182791153. The cubic root of 20308707 is about 272.8312365154.

The spelling of 20308707 in words is "twenty million, three hundred eight thousand, seven hundred seven".