20677239 has 24 divisors (see below), whose sum is σ = 32732544. Its totient is φ = 12474000.

The previous prime is 20677213. The next prime is 20677247. The reversal of 20677239 is 93277602.

It is not a de Polignac number, because 20677239 - 2⁸ = 20676983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20677289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32454 + ... + 33084.

It is an arithmetic number, because the mean of its divisors is an integer number (1363856).

Almost surely, 2^20677239 is an apocalyptic number.

20677239 is a deficient number, since it is larger than the sum of its proper divisors (12055305).

20677239 is a wasteful number, since it uses less digits than its factorization.

20677239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 976 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 20677239 is about 4547.2232186247. The cubic root of 20677239 is about 274.4716643888.

The spelling of 20677239 in words is "twenty million, six hundred seventy-seven thousand, two hundred thirty-nine".