22021999965 has 48 divisors (see below), whose sum is σ = 43719451776. Its totient is φ = 10045296000.

The previous prime is 22021999963. The next prime is 22022000017. The reversal of 22021999965 is 56999912022.

It is not a de Polignac number, because 22021999965 - 2¹ = 22021999963 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021999963) 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, 69390 + ... + 221040.

It is an arithmetic number, because the mean of its divisors is an integer number (910821912).

Almost surely, 2^22021999965 is an apocalyptic number.

It is an amenable number.

22021999965 is a deficient number, since it is larger than the sum of its proper divisors (21697451811).

22021999965 is a wasteful number, since it uses less digits than its factorization.

22021999965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152130 (or 152127 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 54.

The spelling of 22021999965 in words is "twenty-two billion, twenty-one million, nine hundred ninety-nine thousand, nine hundred sixty-five".