21092368 has 80 divisors (see below), whose sum is σ = 47496960. Its totient is φ = 8985600.

The previous prime is 21092353. The next prime is 21092371. The reversal of 21092368 is 86329012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266953 + ... + 267031.

It is an arithmetic number, because the mean of its divisors is an integer number (593712).

Almost surely, 2^21092368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21092368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23748480).

21092368 is an abundant number, since it is smaller than the sum of its proper divisors (26404592).

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

21092368 is a wasteful number, since it uses less digits than its factorization.

21092368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21092368 is about 4592.6428121508. The cubic root of 21092368 is about 276.2963280955.

The spelling of 21092368 in words is "twenty-one million, ninety-two thousand, three hundred sixty-eight".