21034888 has 16 divisors (see below), whose sum is σ = 45074880. Its totient is φ = 9014928.

The previous prime is 21034861. The next prime is 21034891. The reversal of 21034888 is 88843012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187756 + ... + 187867.

It is an arithmetic number, because the mean of its divisors is an integer number (2817180).

Almost surely, 2^21034888 is an apocalyptic number.

21034888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21034888 is an abundant number, since it is smaller than the sum of its proper divisors (24039992).

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

21034888 is a wasteful number, since it uses less digits than its factorization.

21034888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375636 (or 375632 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 21034888 is about 4586.3807081401. The cubic root of 21034888 is about 276.0451161982.

The spelling of 21034888 in words is "twenty-one million, thirty-four thousand, eight hundred eighty-eight".