21484960 has 48 divisors (see below), whose sum is σ = 58012416. Its totient is φ = 7365888.

The previous prime is 21484937. The next prime is 21484973. The reversal of 21484960 is 6948412.

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, 8472 + ... + 10711.

It is an arithmetic number, because the mean of its divisors is an integer number (1208592).

Almost surely, 2^21484960 is an apocalyptic number.

21484960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21484960 is an abundant number, since it is smaller than the sum of its proper divisors (36527456).

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

21484960 is a wasteful number, since it uses less digits than its factorization.

21484960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19205 (or 19197 counting only the distinct ones).

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

The square root of 21484960 is about 4635.1871591123. The cubic root of 21484960 is about 278.0000345048. Note that the first 4 decimals are identical.

The spelling of 21484960 in words is "twenty-one million, four hundred eighty-four thousand, nine hundred sixty".