18125724243 has 32 divisors (see below), whose sum is σ = 27092747520. Its totient is φ = 10682271360.

The previous prime is 18125724233. The next prime is 18125724277. The reversal of 18125724243 is 34242752181.

It is a happy number.

It is not a de Polignac number, because 18125724243 - 2²¹ = 18123627091 is a prime.

It is a super-3 number, since 3×18125724243³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18125724203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2999421 + ... + 3005457.

It is an arithmetic number, because the mean of its divisors is an integer number (846648360).

Almost surely, 2^18125724243 is an apocalyptic number.

18125724243 is a deficient number, since it is larger than the sum of its proper divisors (8967023277).

18125724243 is a wasteful number, since it uses less digits than its factorization.

18125724243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547.

The product of its digits is 107520, while the sum is 39.

The spelling of 18125724243 in words is "eighteen billion, one hundred twenty-five million, seven hundred twenty-four thousand, two hundred forty-three".