21349882 has 8 divisors (see below), whose sum is σ = 33710400. Its totient is φ = 10113084.

The previous prime is 21349877. The next prime is 21349907. The reversal of 21349882 is 28894312.

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

It is a super-2 number, since 2×21349882² = 911634922827848, which contains 22 as substring.

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, 280882 + ... + 280957.

It is an arithmetic number, because the mean of its divisors is an integer number (4213800).

Almost surely, 2^21349882 is an apocalyptic number.

21349882 is a deficient number, since it is larger than the sum of its proper divisors (12360518).

21349882 is a wasteful number, since it uses less digits than its factorization.

21349882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561860.

The product of its digits is 27648, while the sum is 37.

The square root of 21349882 is about 4620.5932519537. The cubic root of 21349882 is about 277.4162049838.

Subtracting from 21349882 its sum of digits (37), we obtain a triangular number (21349845 = T₆₅₃₄).

The spelling of 21349882 in words is "twenty-one million, three hundred forty-nine thousand, eight hundred eighty-two".