20215012 has 12 divisors (see below), whose sum is σ = 37238320. Its totient is φ = 9575496.

The previous prime is 20214991. The next prime is 20215021. The reversal of 20215012 is 21051202.

It is a junction number, because it is equal to n+sod(n) for n = 20214983 and 20215001.

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, 132918 + ... + 133069.

Almost surely, 2^20215012 is an apocalyptic number.

It is an amenable number.

20215012 is a deficient number, since it is larger than the sum of its proper divisors (17023308).

20215012 is a wasteful number, since it uses less digits than its factorization.

20215012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266010 (or 266008 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 20215012 is about 4496.1107637602. The cubic root of 20215012 is about 272.4110171547.

Adding to 20215012 its reverse (21051202), we get a palindrome (41266214).

The spelling of 20215012 in words is "twenty million, two hundred fifteen thousand, twelve".