20215016 has 16 divisors (see below), whose sum is σ = 38132640. Its totient is φ = 10046320.

The previous prime is 20214991. The next prime is 20215021. The reversal of 20215016 is 61051202.

It is a junction number, because it is equal to n+sod(n) for n = 20214985 and 20215003.

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, 6230 + ... + 8901.

It is an arithmetic number, because the mean of its divisors is an integer number (2383290).

Almost surely, 2^20215016 is an apocalyptic number.

It is an amenable number.

20215016 is a deficient number, since it is larger than the sum of its proper divisors (17917624).

20215016 is a wasteful number, since it uses less digits than its factorization.

20215016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15304 (or 15300 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 20215016 is about 4496.1112085890. Note that the first 3 decimals coincide. The cubic root of 20215016 is about 272.4110351223.

Adding to 20215016 its reverse (61051202), we get a palindrome (81266218).

The spelling of 20215016 in words is "twenty million, two hundred fifteen thousand, sixteen".