21610480 has 20 divisors (see below), whose sum is σ = 50244552. Its totient is φ = 8644160.

The previous prime is 21610453. The next prime is 21610487. The reversal of 21610480 is 8401612.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21610487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134986 + ... + 135145.

Almost surely, 2^21610480 is an apocalyptic number.

21610480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21610480 is an abundant number, since it is smaller than the sum of its proper divisors (28634072).

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

21610480 is a wasteful number, since it uses less digits than its factorization.

21610480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270144 (or 270138 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 21610480 is about 4648.7073472095. The cubic root of 21610480 is about 278.5403633371.

The spelling of 21610480 in words is "twenty-one million, six hundred ten thousand, four hundred eighty".