20577667 has 12 divisors (see below), whose sum is σ = 23850216. Its totient is φ = 17603840.

The previous prime is 20577659. The next prime is 20577673. The reversal of 20577667 is 76677502.

It is not a de Polignac number, because 20577667 - 2³ = 20577659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20577637) 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, 58 + ... + 6415.

It is an arithmetic number, because the mean of its divisors is an integer number (1987518).

Almost surely, 2^20577667 is an apocalyptic number.

20577667 is a deficient number, since it is larger than the sum of its proper divisors (3272549).

20577667 is a wasteful number, since it uses less digits than its factorization.

20577667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6518 (or 6501 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The square root of 20577667 is about 4536.2613460867. The cubic root of 20577667 is about 274.0303791773.

The spelling of 20577667 in words is "twenty million, five hundred seventy-seven thousand, six hundred sixty-seven".