21434088 has 32 divisors (see below), whose sum is σ = 57708000. Its totient is φ = 6595008.

The previous prime is 21434053. The next prime is 21434099. The reversal of 21434088 is 88043412.

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, 34038 + ... + 34661.

It is an arithmetic number, because the mean of its divisors is an integer number (1803375).

Almost surely, 2^21434088 is an apocalyptic number.

It is an amenable number.

21434088 is an abundant number, since it is smaller than the sum of its proper divisors (36273912).

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

21434088 is a wasteful number, since it uses less digits than its factorization.

21434088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68721 (or 68717 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 21434088 is about 4629.6963183345. The cubic root of 21434088 is about 277.7804453196.

The spelling of 21434088 in words is "twenty-one million, four hundred thirty-four thousand, eighty-eight".