21373452 has 18 divisors (see below), whose sum is σ = 54027428. Its totient is φ = 7124472.

The previous prime is 21373447. The next prime is 21373487. The reversal of 21373452 is 25437312.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 296818 + ... + 296889.

Almost surely, 2^21373452 is an apocalyptic number.

It is an amenable number.

21373452 is an abundant number, since it is smaller than the sum of its proper divisors (32653976).

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

21373452 is a wasteful number, since it uses less digits than its factorization.

21373452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593717 (or 593712 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 21373452 is about 4623.1430866890. The cubic root of 21373452 is about 277.5182554340.

The spelling of 21373452 in words is "twenty-one million, three hundred seventy-three thousand, four hundred fifty-two".