21319468 has 6 divisors (see below), whose sum is σ = 37309076. Its totient is φ = 10659732.

The previous prime is 21319457. The next prime is 21319471. The reversal of 21319468 is 86491312.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2664930 + ... + 2664937.

Almost surely, 2^21319468 is an apocalyptic number.

It is an amenable number.

21319468 is a deficient number, since it is larger than the sum of its proper divisors (15989608).

21319468 is a wasteful number, since it uses less digits than its factorization.

21319468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5329871 (or 5329869 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 21319468 is about 4617.3009431918. The cubic root of 21319468 is about 277.2844111858.

The spelling of 21319468 in words is "twenty-one million, three hundred nineteen thousand, four hundred sixty-eight".