18132226749 has 48 divisors (see below), whose sum is σ = 32253312000. Its totient is φ = 9558839808.

The previous prime is 18132226747. The next prime is 18132226751. The reversal of 18132226749 is 94762223181.

It is an interprime number because it is at equal distance from previous prime (18132226747) and next prime (18132226751).

It is not a de Polignac number, because 18132226749 - 2¹ = 18132226747 is a prime.

It is a super-2 number, since 2×18132226749² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18132226747) 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, 1738452 + ... + 1748850.

It is an arithmetic number, because the mean of its divisors is an integer number (671944000).

Almost surely, 2^18132226749 is an apocalyptic number.

It is an amenable number.

18132226749 is a deficient number, since it is larger than the sum of its proper divisors (14121085251).

18132226749 is a wasteful number, since it uses less digits than its factorization.

18132226749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12554 (or 12551 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The spelling of 18132226749 in words is "eighteen billion, one hundred thirty-two million, two hundred twenty-six thousand, seven hundred forty-nine".