21481962 has 16 divisors (see below), whose sum is σ = 43366752. Its totient is φ = 7093520.

The previous prime is 21481949. The next prime is 21481963. The reversal of 21481962 is 26918412.

It is a super-2 number, since 2×21481962² = 922949382738888, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21481963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16089 + ... + 17372.

It is an arithmetic number, because the mean of its divisors is an integer number (2710422).

Almost surely, 2^21481962 is an apocalyptic number.

21481962 is an abundant number, since it is smaller than the sum of its proper divisors (21884790).

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

21481962 is a wasteful number, since it uses less digits than its factorization.

21481962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33573.

The product of its digits is 6912, while the sum is 33.

The square root of 21481962 is about 4634.8637520428. The cubic root of 21481962 is about 277.9871032438.

The spelling of 21481962 in words is "twenty-one million, four hundred eighty-one thousand, nine hundred sixty-two".