22719051891 has 12 divisors (see below), whose sum is σ = 32825742768. Its totient is φ = 15141726384.

The previous prime is 22719051881. The next prime is 22719051893. The reversal of 22719051891 is 19815091722.

It is not a de Polignac number, because 22719051891 - 2¹⁵ = 22719019123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22719051893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325455 + ... + 389048.

It is an arithmetic number, because the mean of its divisors is an integer number (2735478564).

Almost surely, 2^22719051891 is an apocalyptic number.

22719051891 is a deficient number, since it is larger than the sum of its proper divisors (10106690877).

22719051891 is a wasteful number, since it uses less digits than its factorization.

22719051891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718042 (or 718039 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

The spelling of 22719051891 in words is "twenty-two billion, seven hundred nineteen million, fifty-one thousand, eight hundred ninety-one".