20854977 has 32 divisors (see below), whose sum is σ = 32973696. Its totient is φ = 11558400.

The previous prime is 20854963. The next prime is 20854979. The reversal of 20854977 is 77945802.

It is not a de Polignac number, because 20854977 - 2⁴ = 20854961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20854979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74077 + ... + 74357.

It is an arithmetic number, because the mean of its divisors is an integer number (1030428).

Almost surely, 2^20854977 is an apocalyptic number.

It is an amenable number.

20854977 is a deficient number, since it is larger than the sum of its proper divisors (12118719).

20854977 is a wasteful number, since it uses less digits than its factorization.

20854977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 20854977 is about 4566.7249752968. The cubic root of 20854977 is about 275.2558588459.

The spelling of 20854977 in words is "twenty million, eight hundred fifty-four thousand, nine hundred seventy-seven".