21192430 has 32 divisors (see below), whose sum is σ = 45494784. Its totient is φ = 6949536.

The previous prime is 21192427. The next prime is 21192433. The reversal of 21192430 is 3429112.

It is an interprime number because it is at equal distance from previous prime (21192427) and next prime (21192433).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4972 + ... + 8191.

It is an arithmetic number, because the mean of its divisors is an integer number (1421712).

Almost surely, 2^21192430 is an apocalyptic number.

21192430 is an abundant number, since it is smaller than the sum of its proper divisors (24302354).

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

21192430 is a wasteful number, since it uses less digits than its factorization.

21192430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 21192430 is about 4603.5236504226. The cubic root of 21192430 is about 276.7325547499.

The spelling of 21192430 in words is "twenty-one million, one hundred ninety-two thousand, four hundred thirty".