21086192 has 10 divisors (see below), whose sum is σ = 40854528. Its totient is φ = 10543088.

The previous prime is 21086179. The next prime is 21086201. The reversal of 21086192 is 29168012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658928 + ... + 658959.

Almost surely, 2^21086192 is an apocalyptic number.

It is an amenable number.

21086192 is a deficient number, since it is larger than the sum of its proper divisors (19768336).

21086192 is a wasteful number, since it uses less digits than its factorization.

21086192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317895 (or 1317889 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 21086192 is about 4591.9703831798. The cubic root of 21086192 is about 276.2693582662.

The spelling of 21086192 in words is "twenty-one million, eighty-six thousand, one hundred ninety-two".