21373088 has 24 divisors (see below), whose sum is σ = 45904320. Its totient is φ = 9714880.

The previous prime is 21373069. The next prime is 21373103. The reversal of 21373088 is 88037312.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30008 + ... + 30711.

It is an arithmetic number, because the mean of its divisors is an integer number (1912680).

Almost surely, 2^21373088 is an apocalyptic number.

It is an amenable number.

21373088 is an abundant number, since it is smaller than the sum of its proper divisors (24531232).

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

21373088 is a wasteful number, since it uses less digits than its factorization.

21373088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60740 (or 60732 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 21373088 is about 4623.1037193643. The cubic root of 21373088 is about 277.5166800027.

It can be divided in two parts, 2137 and 3088, that added together give a palindrome (5225).

The spelling of 21373088 in words is "twenty-one million, three hundred seventy-three thousand, eighty-eight".