22149144787 has 24 divisors (see below), whose sum is σ = 28118958192. Its totient is φ = 17252121600.

The previous prime is 22149144757. The next prime is 22149144791. The reversal of 22149144787 is 78744194122.

It is a happy number.

It is not a de Polignac number, because 22149144787 - 2³¹ = 20001661139 is a prime.

It is a super-2 number, since 2×22149144787² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22149144787.

It is not an unprimeable number, because it can be changed into a prime (22149144757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1632343 + ... + 1645855.

It is an arithmetic number, because the mean of its divisors is an integer number (1171623258).

Almost surely, 2^22149144787 is an apocalyptic number.

22149144787 is a deficient number, since it is larger than the sum of its proper divisors (5969813405).

22149144787 is a wasteful number, since it uses less digits than its factorization.

22149144787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16579 (or 16572 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The spelling of 22149144787 in words is "twenty-two billion, one hundred forty-nine million, one hundred forty-four thousand, seven hundred eighty-seven".