21082952 has 16 divisors (see below), whose sum is σ = 43124400. Its totient is φ = 9583120.

The previous prime is 21082949. The next prime is 21082961. The reversal of 21082952 is 25928012.

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, 119702 + ... + 119877.

It is an arithmetic number, because the mean of its divisors is an integer number (2695275).

Almost surely, 2^21082952 is an apocalyptic number.

21082952 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21082952 is an abundant number, since it is smaller than the sum of its proper divisors (22041448).

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

21082952 is a wasteful number, since it uses less digits than its factorization.

21082952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239596 (or 239592 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 21082952 is about 4591.6175798949. The cubic root of 21082952 is about 276.2552074802.

The spelling of 21082952 in words is "twenty-one million, eighty-two thousand, nine hundred fifty-two".