21107088 has 40 divisors (see below), whose sum is σ = 60586400. Its totient is φ = 7035552.

The previous prime is 21107083. The next prime is 21107101. The reversal of 21107088 is 88070112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21107083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23998 + ... + 24861.

It is an arithmetic number, because the mean of its divisors is an integer number (1514660).

Almost surely, 2^21107088 is an apocalyptic number.

It is an amenable number.

21107088 is an abundant number, since it is smaller than the sum of its proper divisors (39479312).

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

21107088 is a wasteful number, since it uses less digits than its factorization.

21107088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48876 (or 48864 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 21107088 is about 4594.2450957693. The cubic root of 21107088 is about 276.3605872974.

The spelling of 21107088 in words is "twenty-one million, one hundred seven thousand, eighty-eight".