21120488 has 16 divisors (see below), whose sum is σ = 40671780. Its totient is φ = 10274688.

The previous prime is 21120479. The next prime is 21120499. The reversal of 21120488 is 88402112.

It can be written as a sum of positive squares in 2 ways, for example, as 14577124 + 6543364 = 3818^2 + 2558^2 .

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, 35381 + ... + 35972.

Almost surely, 2^21120488 is an apocalyptic number.

It is an amenable number.

21120488 is a deficient number, since it is larger than the sum of its proper divisors (19551292).

21120488 is a wasteful number, since it uses less digits than its factorization.

21120488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71396 (or 71392 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 21120488 is about 4595.7032106088. The cubic root of 21120488 is about 276.4190581528.

The spelling of 21120488 in words is "twenty-one million, one hundred twenty thousand, four hundred eighty-eight".