21375058 has 8 divisors (see below), whose sum is σ = 33096960. Its totient is φ = 10342740.

The previous prime is 21375049. The next prime is 21375061. The reversal of 21375058 is 85057312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172318 + ... + 172441.

It is an arithmetic number, because the mean of its divisors is an integer number (4137120).

Almost surely, 2^21375058 is an apocalyptic number.

21375058 is a deficient number, since it is larger than the sum of its proper divisors (11721902).

21375058 is a wasteful number, since it uses less digits than its factorization.

21375058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344792.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 21375058 is about 4623.3167747841. The cubic root of 21375058 is about 277.5252061621.

The spelling of 21375058 in words is "twenty-one million, three hundred seventy-five thousand, fifty-eight".