21052698 has 16 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 6604736.

The previous prime is 21052687. The next prime is 21052709. The reversal of 21052698 is 89625012.

It is an interprime number because it is at equal distance from previous prime (21052687) and next prime (21052709).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 103098 + ... + 103301.

It is an arithmetic number, because the mean of its divisors is an integer number (2786400).

Almost surely, 2^21052698 is an apocalyptic number.

21052698 is an abundant number, since it is smaller than the sum of its proper divisors (23529702).

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

21052698 is a wasteful number, since it uses less digits than its factorization.

21052698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206421.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 21052698 is about 4588.3219154719. The cubic root of 21052698 is about 276.1230023054.

The spelling of 21052698 in words is "twenty-one million, fifty-two thousand, six hundred ninety-eight".