21395692 has 6 divisors (see below), whose sum is σ = 37442468. Its totient is φ = 10697844.

The previous prime is 21395677. The next prime is 21395723. The reversal of 21395692 is 29659312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2674458 + ... + 2674465.

Almost surely, 2^21395692 is an apocalyptic number.

It is an amenable number.

21395692 is a deficient number, since it is larger than the sum of its proper divisors (16046776).

21395692 is a wasteful number, since it uses less digits than its factorization.

21395692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5348927 (or 5348925 counting only the distinct ones).

The product of its digits is 29160, while the sum is 37.

The square root of 21395692 is about 4625.5477513479. The cubic root of 21395692 is about 277.6144786442.

The spelling of 21395692 in words is "twenty-one million, three hundred ninety-five thousand, six hundred ninety-two".