21254982 has 16 divisors (see below), whose sum is σ = 48582912. Its totient is φ = 6072840.

The previous prime is 21254963. The next prime is 21254993. The reversal of 21254982 is 28945212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252994 + ... + 253077.

It is an arithmetic number, because the mean of its divisors is an integer number (3036432).

Almost surely, 2^21254982 is an apocalyptic number.

21254982 is an abundant number, since it is smaller than the sum of its proper divisors (27327930).

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

21254982 is a wasteful number, since it uses less digits than its factorization.

21254982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506083.

The product of its digits is 11520, while the sum is 33.

The square root of 21254982 is about 4610.3125707483. The cubic root of 21254982 is about 277.0045570894.

The spelling of 21254982 in words is "twenty-one million, two hundred fifty-four thousand, nine hundred eighty-two".