21375034 has 8 divisors (see below), whose sum is σ = 32380308. Its totient is φ = 10581600.

The previous prime is 21375031. The next prime is 21375043. The reversal of 21375034 is 43057312.

It can be written as a sum of positive squares in 2 ways, for example, as 14630625 + 6744409 = 3825^2 + 2597^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21375031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52707 + ... + 53110.

Almost surely, 2^21375034 is an apocalyptic number.

21375034 is a deficient number, since it is larger than the sum of its proper divisors (11005274).

21375034 is a wasteful number, since it uses less digits than its factorization.

21375034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105920.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 21375034 is about 4623.3141792441. The cubic root of 21375034 is about 277.5251022932.

The spelling of 21375034 in words is "twenty-one million, three hundred seventy-five thousand, thirty-four".