21030995 has 8 divisors (see below), whose sum is σ = 25461216. Its totient is φ = 16675456.

The previous prime is 21030979. The next prime is 21031009. The reversal of 21030995 is 59903012.

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

It is a cyclic number.

It is not a de Polignac number, because 21030995 - 2⁴ = 21030979 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18047 + ... + 19176.

It is an arithmetic number, because the mean of its divisors is an integer number (3182652).

Almost surely, 2^21030995 is an apocalyptic number.

21030995 is a deficient number, since it is larger than the sum of its proper divisors (4430221).

21030995 is a wasteful number, since it uses less digits than its factorization.

21030995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37341.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 21030995 is about 4585.9562797742. The cubic root of 21030995 is about 276.0280856037.

The spelling of 21030995 in words is "twenty-one million, thirty thousand, nine hundred ninety-five".