21574952 has 16 divisors (see below), whose sum is σ = 46232160. Its totient is φ = 9246384.

The previous prime is 21574951. The next prime is 21574957. The reversal of 21574952 is 25947512.

It is not an unprimeable number, because it can be changed into a prime (21574951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192578 + ... + 192689.

It is an arithmetic number, because the mean of its divisors is an integer number (2889510).

Almost surely, 2^21574952 is an apocalyptic number.

It is an amenable number.

21574952 is an abundant number, since it is smaller than the sum of its proper divisors (24657208).

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

21574952 is a wasteful number, since it uses less digits than its factorization.

21574952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385280 (or 385276 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 21574952 is about 4644.8844980258. The cubic root of 21574952 is about 278.3876378996.

The spelling of 21574952 in words is "twenty-one million, five hundred seventy-four thousand, nine hundred fifty-two".