21319074 has 24 divisors (see below), whose sum is σ = 52790400. Its totient is φ = 6091128.

The previous prime is 21319063. The next prime is 21319087. The reversal of 21319074 is 47091312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84474 + ... + 84725.

It is an arithmetic number, because the mean of its divisors is an integer number (2199600).

Almost surely, 2^21319074 is an apocalyptic number.

21319074 is an abundant number, since it is smaller than the sum of its proper divisors (31471326).

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

21319074 is a wasteful number, since it uses less digits than its factorization.

21319074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169214 (or 169211 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 21319074 is about 4617.2582773763. The cubic root of 21319074 is about 277.2827030330.

The spelling of 21319074 in words is "twenty-one million, three hundred nineteen thousand, seventy-four".