21493174 has 8 divisors (see below), whose sum is σ = 32426640. Its totient is φ = 10684296.

The previous prime is 21493159. The next prime is 21493193. The reversal of 21493174 is 47139412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 30714 + ... + 31405.

It is an arithmetic number, because the mean of its divisors is an integer number (4053330).

Almost surely, 2^21493174 is an apocalyptic number.

21493174 is a deficient number, since it is larger than the sum of its proper divisors (10933466).

21493174 is a wasteful number, since it uses less digits than its factorization.

21493174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62294.

The product of its digits is 6048, while the sum is 31.

The square root of 21493174 is about 4636.0731228055. The cubic root of 21493174 is about 278.0354577550.

The spelling of 21493174 in words is "twenty-one million, four hundred ninety-three thousand, one hundred seventy-four".