22018751999 has 2 divisors, whose sum is σ = 22018752000. Its totient is φ = 22018751998.

The previous prime is 22018751987. The next prime is 22018752001. The reversal of 22018751999 is 99915781022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22018751999 is a prime.

It is a Sophie Germain prime.

Together with 22018752001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22018751999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22018751959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11009375999 + 11009376000.

It is an arithmetic number, because the mean of its divisors is an integer number (11009376000).

Almost surely, 2^22018751999 is an apocalyptic number.

22018751999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22018751999 is an equidigital number, since it uses as much as digits as its factorization.

22018751999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 53.

The spelling of 22018751999 in words is "twenty-two billion, eighteen million, seven hundred fifty-one thousand, nine hundred ninety-nine".