20558016 has 56 divisors (see below), whose sum is σ = 60441840. Its totient is φ = 6852096.

The previous prime is 20558009. The next prime is 20558029. The reversal of 20558016 is 61085502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4221 + ... + 7676.

Almost surely, 2^20558016 is an apocalyptic number.

It is an amenable number.

20558016 is an abundant number, since it is smaller than the sum of its proper divisors (39883824).

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

20558016 is a wasteful number, since it uses less digits than its factorization.

20558016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11918 (or 11902 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 20558016 is about 4534.0948380024. The cubic root of 20558016 is about 273.9431213742.

The spelling of 20558016 in words is "twenty million, five hundred fifty-eight thousand, sixteen".