21995558095 has 16 divisors (see below), whose sum is σ = 30578564160. Its totient is φ = 14876054784.

The previous prime is 21995558089. The next prime is 21995558113. The reversal of 21995558095 is 59085559912.

It is a cyclic number.

It is not a de Polignac number, because 21995558095 - 2¹¹ = 21995556047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4301860 + ... + 4306969.

It is an arithmetic number, because the mean of its divisors is an integer number (1911160260).

Almost surely, 2^21995558095 is an apocalyptic number.

21995558095 is a deficient number, since it is larger than the sum of its proper divisors (8583006065).

21995558095 is an equidigital number, since it uses as much as digits as its factorization.

21995558095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8608914.

The product of its (nonzero) digits is 7290000, while the sum is 58.

The spelling of 21995558095 in words is "twenty-one billion, nine hundred ninety-five million, five hundred fifty-eight thousand, ninety-five".