22363487491 has 2 divisors, whose sum is σ = 22363487492. Its totient is φ = 22363487490.

The previous prime is 22363487479. The next prime is 22363487519. The reversal of 22363487491 is 19478436322.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22363487491 is a prime.

It is a super-2 number, since 2×22363487491² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22363487191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11181743745 + 11181743746.

It is an arithmetic number, because the mean of its divisors is an integer number (11181743746).

Almost surely, 2^22363487491 is an apocalyptic number.

22363487491 is a deficient number, since it is larger than the sum of its proper divisors (1).

22363487491 is an equidigital number, since it uses as much as digits as its factorization.

22363487491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The spelling of 22363487491 in words is "twenty-two billion, three hundred sixty-three million, four hundred eighty-seven thousand, four hundred ninety-one".