21496492 has 6 divisors (see below), whose sum is σ = 37618868. Its totient is φ = 10748244.

The previous prime is 21496463. The next prime is 21496493. The reversal of 21496492 is 29469412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21496493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2687058 + ... + 2687065.

Almost surely, 2^21496492 is an apocalyptic number.

It is an amenable number.

21496492 is a deficient number, since it is larger than the sum of its proper divisors (16122376).

21496492 is a wasteful number, since it uses less digits than its factorization.

21496492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5374127 (or 5374125 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 21496492 is about 4636.4309549480. The cubic root of 21496492 is about 278.0497642224.

The spelling of 21496492 in words is "twenty-one million, four hundred ninety-six thousand, four hundred ninety-two".