21902162 has 8 divisors (see below), whose sum is σ = 32874492. Its totient is φ = 10944000.

The previous prime is 21902143. The next prime is 21902173. The reversal of 21902162 is 26120912.

It can be written as a sum of positive squares in 2 ways, for example, as 21724921 + 177241 = 4661^2 + 421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2162 + ... + 6962.

Almost surely, 2^21902162 is an apocalyptic number.

21902162 is a deficient number, since it is larger than the sum of its proper divisors (10972330).

21902162 is a wasteful number, since it uses less digits than its factorization.

21902162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 21902162 is about 4679.9745725805. The cubic root of 21902162 is about 279.7879431817.

The spelling of 21902162 in words is "twenty-one million, nine hundred two thousand, one hundred sixty-two".