20679231 has 8 divisors (see below), whose sum is σ = 28771200. Its totient is φ = 13186712.

The previous prime is 20679229. The next prime is 20679251. The reversal of 20679231 is 13297602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20679231 - 2¹ = 20679229 is a prime.

It is a super-2 number, since 2×20679231² = 855261189502722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679251) 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, 149781 + ... + 149918.

It is an arithmetic number, because the mean of its divisors is an integer number (3596400).

Almost surely, 2^20679231 is an apocalyptic number.

20679231 is a deficient number, since it is larger than the sum of its proper divisors (8091969).

20679231 is a wasteful number, since it uses less digits than its factorization.

20679231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299725.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20679231 is about 4547.4422481215. The cubic root of 20679231 is about 274.4804781058.

It can be divided in two parts, 20679 and 231, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 20679231 in words is "twenty million, six hundred seventy-nine thousand, two hundred thirty-one".