20079707 has 4 divisors (see below), whose sum is σ = 20166120. Its totient is φ = 19993296.

The previous prime is 20079701. The next prime is 20079721. The reversal of 20079707 is 70797002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20079707 - 2¹² = 20075611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20079701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42857 + ... + 43322.

It is an arithmetic number, because the mean of its divisors is an integer number (5041530).

Almost surely, 2^20079707 is an apocalyptic number.

20079707 is a deficient number, since it is larger than the sum of its proper divisors (86413).

20079707 is an equidigital number, since it uses as much as digits as its factorization.

20079707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86412.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 20079707 is about 4481.0386072874. The cubic root of 20079707 is about 271.8018804908.

The spelling of 20079707 in words is "twenty million, seventy-nine thousand, seven hundred seven".