21903682 has 8 divisors (see below), whose sum is σ = 34284096. Its totient is φ = 10475652.

The previous prime is 21903677. The next prime is 21903683. The reversal of 21903682 is 28630912.

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

It is not an unprimeable number, because it can be changed into a prime (21903683) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 238038 + ... + 238129.

It is an arithmetic number, because the mean of its divisors is an integer number (4285512).

Almost surely, 2^21903682 is an apocalyptic number.

21903682 is a deficient number, since it is larger than the sum of its proper divisors (12380414).

21903682 is a wasteful number, since it uses less digits than its factorization.

21903682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476192.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21903682 is about 4680.1369638078. The cubic root of 21903682 is about 279.7944154170.

The spelling of 21903682 in words is "twenty-one million, nine hundred three thousand, six hundred eighty-two".