21995348845 has 32 divisors (see below), whose sum is σ = 28523819520. Its totient is φ = 16232536320.

The previous prime is 21995348801. The next prime is 21995348911. The reversal of 21995348845 is 54884359912.

It is a happy number.

It is not a de Polignac number, because 21995348845 - 2⁷ = 21995348717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21995348845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3435187 + ... + 3441583.

It is an arithmetic number, because the mean of its divisors is an integer number (891369360).

Almost surely, 2^21995348845 is an apocalyptic number.

It is an amenable number.

21995348845 is a deficient number, since it is larger than the sum of its proper divisors (6528470675).

21995348845 is a wasteful number, since it uses less digits than its factorization.

21995348845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7485.

The product of its digits is 12441600, while the sum is 58.

The spelling of 21995348845 in words is "twenty-one billion, nine hundred ninety-five million, three hundred forty-eight thousand, eight hundred forty-five".