21106698 has 8 divisors (see below), whose sum is σ = 42213408. Its totient is φ = 7035564.

The previous prime is 21106669. The next prime is 21106717. The reversal of 21106698 is 89660112.

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

21106698 is an admirable number.

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, 1758886 + ... + 1758897.

It is an arithmetic number, because the mean of its divisors is an integer number (5276676).

Almost surely, 2^21106698 is an apocalyptic number.

21106698 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21106698 is a wasteful number, since it uses less digits than its factorization.

21106698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517788.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 21106698 is about 4594.2026511681. The cubic root of 21106698 is about 276.3588851632.

The spelling of 21106698 in words is "twenty-one million, one hundred six thousand, six hundred ninety-eight".