20617677 has 12 divisors (see below), whose sum is σ = 30055740. Its totient is φ = 13618368.

The previous prime is 20617673. The next prime is 20617687. The reversal of 20617677 is 77671602.

It can be written as a sum of positive squares in 2 ways, for example, as 4888521 + 15729156 = 2211^2 + 3966^2 .

It is not a de Polignac number, because 20617677 - 2² = 20617673 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20617673) 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, 9528 + ... + 11489.

It is an arithmetic number, because the mean of its divisors is an integer number (2504645).

Almost surely, 2^20617677 is an apocalyptic number.

It is an amenable number.

20617677 is a deficient number, since it is larger than the sum of its proper divisors (9438063).

20617677 is a wasteful number, since it uses less digits than its factorization.

20617677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21132 (or 21129 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 20617677 is about 4540.6692238039. The cubic root of 20617677 is about 274.2078670213.

The spelling of 20617677 in words is "twenty million, six hundred seventeen thousand, six hundred seventy-seven".