20757772 has 18 divisors (see below), whose sum is σ = 42257292. Its totient is φ = 8896104.

The previous prime is 20757757. The next prime is 20757791. The reversal of 20757772 is 27775702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52758 + ... + 53149.

Almost surely, 2^20757772 is an apocalyptic number.

It is an amenable number.

20757772 is an abundant number, since it is smaller than the sum of its proper divisors (21499520).

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

20757772 is a wasteful number, since it uses less digits than its factorization.

20757772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105925 (or 105916 counting only the distinct ones).

The product of its (nonzero) digits is 48020, while the sum is 37.

The square root of 20757772 is about 4556.0697975338. The cubic root of 20757772 is about 274.8275370436.

The spelling of 20757772 in words is "twenty million, seven hundred fifty-seven thousand, seven hundred seventy-two".