21386882 has 8 divisors (see below), whose sum is σ = 34996752. Its totient is φ = 9721300.

The previous prime is 21386879. The next prime is 21386917. The reversal of 21386882 is 28868312.

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, 486044 + ... + 486087.

It is an arithmetic number, because the mean of its divisors is an integer number (4374594).

Almost surely, 2^21386882 is an apocalyptic number.

21386882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21386882 is a deficient number, since it is larger than the sum of its proper divisors (13609870).

21386882 is a wasteful number, since it uses less digits than its factorization.

21386882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972144.

The product of its digits is 36864, while the sum is 38.

The square root of 21386882 is about 4624.5953336481. The cubic root of 21386882 is about 277.5763694253.

The spelling of 21386882 in words is "twenty-one million, three hundred eighty-six thousand, eight hundred eighty-two".