21319052 has 12 divisors (see below), whose sum is σ = 37342200. Its totient is φ = 10649856.

The previous prime is 21319033. The next prime is 21319061. The reversal of 21319052 is 25091312.

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 3 ways as a sum of consecutive naturals, for example, 5228 + ... + 8364.

It is an arithmetic number, because the mean of its divisors is an integer number (3111850).

Almost surely, 2^21319052 is an apocalyptic number.

It is an amenable number.

21319052 is a deficient number, since it is larger than the sum of its proper divisors (16023148).

21319052 is a wasteful number, since it uses less digits than its factorization.

21319052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4840 (or 4838 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 21319052 is about 4617.2558950095. The cubic root of 21319052 is about 277.2826076533.

The spelling of 21319052 in words is "twenty-one million, three hundred nineteen thousand, fifty-two".