21960995 has 16 divisors (see below), whose sum is σ = 30214080. Its totient is φ = 15010944.

The previous prime is 21960977. The next prime is 21960997. The reversal of 21960995 is 59906912.

It is a cyclic number.

It is not a de Polignac number, because 21960995 - 2⁶ = 21960931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21960997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12809 + ... + 14421.

It is an arithmetic number, because the mean of its divisors is an integer number (1888380).

Almost surely, 2^21960995 is an apocalyptic number.

21960995 is a deficient number, since it is larger than the sum of its proper divisors (8253085).

21960995 is a wasteful number, since it uses less digits than its factorization.

21960995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 21960995 is about 4686.2559682544. The cubic root of 21960995 is about 280.0382388252.

The spelling of 21960995 in words is "twenty-one million, nine hundred sixty thousand, nine hundred ninety-five".