21692230 has 32 divisors (see below), whose sum is σ = 44789760. Its totient is φ = 7409760.

The previous prime is 21692213. The next prime is 21692263. The reversal of 21692230 is 3229612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21692195 and 21692204.

It is a congruent number.

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, 29811 + ... + 30529.

It is an arithmetic number, because the mean of its divisors is an integer number (1399680).

Almost surely, 2^21692230 is an apocalyptic number.

21692230 is an abundant number, since it is smaller than the sum of its proper divisors (23097530).

21692230 is a wasteful number, since it uses less digits than its factorization.

21692230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 21692230 is about 4657.4918142709. The cubic root of 21692230 is about 278.8911502691.

The spelling of 21692230 in words is "twenty-one million, six hundred ninety-two thousand, two hundred thirty".