21492192 has 48 divisors (see below), whose sum is σ = 59391360. Its totient is φ = 6786432.

The previous prime is 21492167. The next prime is 21492203. The reversal of 21492192 is 29129412.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4068 + ... + 7715.

It is an arithmetic number, because the mean of its divisors is an integer number (1237320).

Almost surely, 2^21492192 is an apocalyptic number.

It is an amenable number.

21492192 is an abundant number, since it is smaller than the sum of its proper divisors (37899168).

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

21492192 is a wasteful number, since it uses less digits than its factorization.

21492192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11815 (or 11807 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 21492192 is about 4635.9672129988. The cubic root of 21492192 is about 278.0312233102.

The spelling of 21492192 in words is "twenty-one million, four hundred ninety-two thousand, one hundred ninety-two".