20777308 has 12 divisors (see below), whose sum is σ = 36393280. Its totient is φ = 10379232.

The previous prime is 20777293. The next prime is 20777321. The reversal of 20777308 is 80377702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5560 + ... + 8512.

Almost surely, 2^20777308 is an apocalyptic number.

It is an amenable number.

20777308 is a deficient number, since it is larger than the sum of its proper divisors (15615972).

20777308 is a wasteful number, since it uses less digits than its factorization.

20777308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4716 (or 4714 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The square root of 20777308 is about 4558.2132464377. The cubic root of 20777308 is about 274.9137272074.

The spelling of 20777308 in words is "twenty million, seven hundred seventy-seven thousand, three hundred eight".