20959677 has 12 divisors (see below), whose sum is σ = 30727840. Its totient is φ = 13764168.

The previous prime is 20959667. The next prime is 20959703. The reversal of 20959677 is 77695902.

It is not a de Polignac number, because 20959677 - 2⁶ = 20959613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20959667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16777 + ... + 17982.

Almost surely, 2^20959677 is an apocalyptic number.

It is an amenable number.

20959677 is a deficient number, since it is larger than the sum of its proper divisors (9768163).

20959677 is a wasteful number, since it uses less digits than its factorization.

20959677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34832 (or 34829 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 20959677 is about 4578.1739809666. The cubic root of 20959677 is about 275.7157202100.

The spelling of 20959677 in words is "twenty million, nine hundred fifty-nine thousand, six hundred seventy-seven".