20776650 has 24 divisors (see below), whose sum is σ = 51526464. Its totient is φ = 5540400.

The previous prime is 20776631. The next prime is 20776663. The reversal of 20776650 is 5667702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69106 + ... + 69405.

It is an arithmetic number, because the mean of its divisors is an integer number (2146936).

Almost surely, 2^20776650 is an apocalyptic number.

20776650 is an abundant number, since it is smaller than the sum of its proper divisors (30749814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20776650 is a wasteful number, since it uses less digits than its factorization.

20776650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138526 (or 138521 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 20776650 is about 4558.1410684620. The cubic root of 20776650 is about 274.9108250806.

The spelling of 20776650 in words is "twenty million, seven hundred seventy-six thousand, six hundred fifty".