21900382 has 8 divisors (see below), whose sum is σ = 37543536. Its totient is φ = 9385872.

The previous prime is 21900379. The next prime is 21900391. The reversal of 21900382 is 28300912.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782143 + ... + 782170.

It is an arithmetic number, because the mean of its divisors is an integer number (4692942).

Almost surely, 2^21900382 is an apocalyptic number.

21900382 is a deficient number, since it is larger than the sum of its proper divisors (15643154).

21900382 is a wasteful number, since it uses less digits than its factorization.

21900382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564322.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 21900382 is about 4679.7843967431. The cubic root of 21900382 is about 279.7803634729.

The spelling of 21900382 in words is "twenty-one million, nine hundred thousand, three hundred eighty-two".