21366692 has 12 divisors (see below), whose sum is σ = 37622256. Its totient is φ = 10617480.

The previous prime is 21366689. The next prime is 21366713. The reversal of 21366692 is 29666312.

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, 15734 + ... + 17037.

It is an arithmetic number, because the mean of its divisors is an integer number (3135188).

Almost surely, 2^21366692 is an apocalyptic number.

It is an amenable number.

21366692 is a deficient number, since it is larger than the sum of its proper divisors (16255564).

21366692 is a wasteful number, since it uses less digits than its factorization.

21366692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32938 (or 32936 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 21366692 is about 4622.4119245260. The cubic root of 21366692 is about 277.4889945044.

The spelling of 21366692 in words is "twenty-one million, three hundred sixty-six thousand, six hundred ninety-two".