21112492 has 12 divisors (see below), whose sum is σ = 37046016. Its totient is φ = 10527920.

The previous prime is 21112433. The next prime is 21112547. The reversal of 21112492 is 29421112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5359 + ... + 8422.

It is an arithmetic number, because the mean of its divisors is an integer number (3087168).

Almost surely, 2^21112492 is an apocalyptic number.

It is an amenable number.

21112492 is a deficient number, since it is larger than the sum of its proper divisors (15933524).

21112492 is a wasteful number, since it uses less digits than its factorization.

21112492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14168 (or 14166 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 21112492 is about 4594.8331852201. The cubic root of 21112492 is about 276.3841706102.

The spelling of 21112492 in words is "twenty-one million, one hundred twelve thousand, four hundred ninety-two".