18058972578 has 16 divisors (see below), whose sum is σ = 36612712416. Its totient is φ = 5937196320.

The previous prime is 18058972559. The next prime is 18058972637. The reversal of 18058972578 is 87527985081.

It is a super-2 number, since 2×18058972578² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20614828 + ... + 20615703.

It is an arithmetic number, because the mean of its divisors is an integer number (2288294526).

Almost surely, 2^18058972578 is an apocalyptic number.

18058972578 is an abundant number, since it is smaller than the sum of its proper divisors (18553739838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18058972578 is a wasteful number, since it uses less digits than its factorization.

18058972578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41230609.

The product of its (nonzero) digits is 11289600, while the sum is 60.

The spelling of 18058972578 in words is "eighteen billion, fifty-eight million, nine hundred seventy-two thousand, five hundred seventy-eight".