18632523001 has 3 divisors (see below), whose sum is σ = 18632659503. Its totient is φ = 18632386500.

The previous prime is 18632522989. The next prime is 18632523137. The reversal of 18632523001 is 10032523681.

The square root of 18632523001 is 136501.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3102378601 + 15530144400 = 55699^2 + 124620^2 .

It is not a de Polignac number, because 18632523001 - 2⁵ = 18632522969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18632521001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 68251 + ... + 204751.

It is an arithmetic number, because the mean of its divisors is an integer number (6210886501).

Almost surely, 2^18632523001 is an apocalyptic number.

18632523001 is the 136501-st square number.

18632523001 is the 68251-st centered octagonal number.

It is an amenable number.

18632523001 is a deficient number, since it is larger than the sum of its proper divisors (136502).

18632523001 is an frugal number, since it uses more digits than its factorization.

18632523001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273002 (or 136501 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 18632523001 in words is "eighteen billion, six hundred thirty-two million, five hundred twenty-three thousand, one".