20215112 has 8 divisors (see below), whose sum is σ = 37903350. Its totient is φ = 10107552.

The previous prime is 20215109. The next prime is 20215133. The reversal of 20215112 is 21151202.

It can be written as a sum of positive squares in only one way, i.e., 19838116 + 376996 = 4454^2 + 614^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1263437 + ... + 1263452.

Almost surely, 2^20215112 is an apocalyptic number.

It is an amenable number.

20215112 is a deficient number, since it is larger than the sum of its proper divisors (17688238).

20215112 is a wasteful number, since it uses less digits than its factorization.

20215112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526895 (or 2526891 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 20215112 is about 4496.1218844689. The cubic root of 20215112 is about 272.4114663433.

Adding to 20215112 its reverse (21151202), we get a palindrome (41366314).

The spelling of 20215112 in words is "twenty million, two hundred fifteen thousand, one hundred twelve".