21620095 has 8 divisors (see below), whose sum is σ = 29650464. Its totient is φ = 14825184.

The previous prime is 21620087. The next prime is 21620101. The reversal of 21620095 is 59002612.

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 21620095 - 2³ = 21620087 is a prime.

It is a Duffinian number.

It is a congruent 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, 308824 + ... + 308893.

It is an arithmetic number, because the mean of its divisors is an integer number (3706308).

Almost surely, 2^21620095 is an apocalyptic number.

21620095 is a deficient number, since it is larger than the sum of its proper divisors (8030369).

21620095 is an equidigital number, since it uses as much as digits as its factorization.

21620095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617729.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21620095 is about 4649.7413906582. The cubic root of 21620095 is about 278.5816668852.

The spelling of 21620095 in words is "twenty-one million, six hundred twenty thousand, ninety-five".