21480894 has 24 divisors (see below), whose sum is σ = 49280400. Its totient is φ = 6739008.

The previous prime is 21480889. The next prime is 21480913. The reversal of 21480894 is 49808412.

It is a super-2 number, since 2×21480894² = 922857614078472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34794 + ... + 35405.

It is an arithmetic number, because the mean of its divisors is an integer number (2053350).

Almost surely, 2^21480894 is an apocalyptic number.

21480894 is an abundant number, since it is smaller than the sum of its proper divisors (27799506).

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

21480894 is a wasteful number, since it uses less digits than its factorization.

21480894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70224 (or 70221 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 21480894 is about 4634.7485368680. The cubic root of 21480894 is about 277.9824963532.

The spelling of 21480894 in words is "twenty-one million, four hundred eighty thousand, eight hundred ninety-four".