21264982 has 8 divisors (see below), whose sum is σ = 32112000. Its totient is φ = 10560984.

The previous prime is 21264979. The next prime is 21265001. The reversal of 21264982 is 28946212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a pancake number, because a pancake can be divided into 21264982 parts by 6521 straight cuts.

It is a congruent number.

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, 35382 + ... + 35977.

It is an arithmetic number, because the mean of its divisors is an integer number (4014000).

Almost surely, 2^21264982 is an apocalyptic number.

21264982 is a deficient number, since it is larger than the sum of its proper divisors (10847018).

21264982 is a wasteful number, since it uses less digits than its factorization.

21264982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71510.

The product of its digits is 13824, while the sum is 34.

The square root of 21264982 is about 4611.3969683817. The cubic root of 21264982 is about 277.0479917889.

The spelling of 21264982 in words is "twenty-one million, two hundred sixty-four thousand, nine hundred eighty-two".