21907482 has 16 divisors (see below), whose sum is σ = 44241600. Its totient is φ = 7231392.

The previous prime is 21907471. The next prime is 21907493. The reversal of 21907482 is 28470912.

It is a happy number.

21907482 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (21907471) and next prime (21907493).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17107 + ... + 18342.

It is an arithmetic number, because the mean of its divisors is an integer number (2765100).

Almost surely, 2^21907482 is an apocalyptic number.

21907482 is an abundant number, since it is smaller than the sum of its proper divisors (22334118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21907482 is a wasteful number, since it uses less digits than its factorization.

21907482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35557.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 21907482 is about 4680.5429172266. The cubic root of 21907482 is about 279.8105946953.

The spelling of 21907482 in words is "twenty-one million, nine hundred seven thousand, four hundred eighty-two".