21192150 has 48 divisors (see below), whose sum is σ = 60067584. Its totient is φ = 4843680.

The previous prime is 21192137. The next prime is 21192161. The reversal of 21192150 is 5129112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9042 + ... + 11141.

It is an arithmetic number, because the mean of its divisors is an integer number (1251408).

Almost surely, 2^21192150 is an apocalyptic number.

21192150 is an abundant number, since it is smaller than the sum of its proper divisors (38875434).

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

21192150 is a wasteful number, since it uses less digits than its factorization.

21192150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20205 (or 20200 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 21192150 is about 4603.4932388350. The cubic root of 21192150 is about 276.7313359900.

The spelling of 21192150 in words is "twenty-one million, one hundred ninety-two thousand, one hundred fifty".