21900795 has 48 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 9863616.

The previous prime is 21900793. The next prime is 21900821. The reversal of 21900795 is 59700912.

It is not a de Polignac number, because 21900795 - 2¹ = 21900793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21900793) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60826 + ... + 61184.

It is an arithmetic number, because the mean of its divisors is an integer number (861840).

Almost surely, 2^21900795 is an apocalyptic number.

21900795 is a deficient number, since it is larger than the sum of its proper divisors (19467525).

21900795 is a wasteful number, since it uses less digits than its factorization.

21900795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 33.

The square root of 21900795 is about 4679.8285224995. The cubic root of 21900795 is about 279.7821221723.

The spelling of 21900795 in words is "twenty-one million, nine hundred thousand, seven hundred ninety-five".