20187212 has 12 divisors (see below), whose sum is σ = 35369376. Its totient is φ = 10081680.

The previous prime is 20187203. The next prime is 20187227. The reversal of 20187212 is 21278102.

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, 1613 + ... + 6555.

It is an arithmetic number, because the mean of its divisors is an integer number (2947448).

Almost surely, 2^20187212 is an apocalyptic number.

It is an amenable number.

20187212 is a deficient number, since it is larger than the sum of its proper divisors (15182164).

20187212 is a wasteful number, since it uses less digits than its factorization.

20187212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968 (or 5966 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 20187212 is about 4493.0181392912. The cubic root of 20187212 is about 272.2860852403.

The spelling of 20187212 in words is "twenty million, one hundred eighty-seven thousand, two hundred twelve".