18058972491 has 48 divisors (see below), whose sum is σ = 32475225600. Its totient is φ = 9870726096.

The previous prime is 18058972489. The next prime is 18058972511. The reversal of 18058972491 is 19427985081.

It is a happy number.

18058972491 is a `hidden beast` number, since 1 + 8 + 0 + 5 + 89 + 72 + 491 = 666.

It is not a de Polignac number, because 18058972491 - 2¹ = 18058972489 is a prime.

It is a super-2 number, since 2×18058972491² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18058772491) 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, 266311 + ... + 327168.

It is an arithmetic number, because the mean of its divisors is an integer number (676567200).

Almost surely, 2^18058972491 is an apocalyptic number.

18058972491 is a deficient number, since it is larger than the sum of its proper divisors (14416253109).

18058972491 is a wasteful number, since it uses less digits than its factorization.

18058972491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593525 (or 593512 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The spelling of 18058972491 in words is "eighteen billion, fifty-eight million, nine hundred seventy-two thousand, four hundred ninety-one".