21173352 has 32 divisors (see below), whose sum is σ = 53131680. Its totient is φ = 7031360.

The previous prime is 21173351. The next prime is 21173357. The reversal of 21173352 is 25337112.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21173351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5527 + ... + 8537.

It is an arithmetic number, because the mean of its divisors is an integer number (1660365).

Almost surely, 2^21173352 is an apocalyptic number.

It is an amenable number.

21173352 is an abundant number, since it is smaller than the sum of its proper divisors (31958328).

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

21173352 is a wasteful number, since it uses less digits than its factorization.

21173352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3313 (or 3309 counting only the distinct ones).

The product of its digits is 1260, while the sum is 24.

The square root of 21173352 is about 4601.4510754761. The cubic root of 21173352 is about 276.6494891030.

The spelling of 21173352 in words is "twenty-one million, one hundred seventy-three thousand, three hundred fifty-two".