21963692 has 6 divisors (see below), whose sum is σ = 38436468. Its totient is φ = 10981844.

The previous prime is 21963671. The next prime is 21963707. The reversal of 21963692 is 29636912.

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, 2745458 + ... + 2745465.

It is an arithmetic number, because the mean of its divisors is an integer number (6406078).

Almost surely, 2^21963692 is an apocalyptic number.

It is an amenable number.

21963692 is a deficient number, since it is larger than the sum of its proper divisors (16472776).

21963692 is a wasteful number, since it uses less digits than its factorization.

21963692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490927 (or 5490925 counting only the distinct ones).

The product of its digits is 34992, while the sum is 38.

The square root of 21963692 is about 4686.5437157889. The cubic root of 21963692 is about 280.0497020613.

The spelling of 21963692 in words is "twenty-one million, nine hundred sixty-three thousand, six hundred ninety-two".