18528475431 has 8 divisors (see below), whose sum is σ = 24793821424. Its totient is φ = 12307723200.

The previous prime is 18528475393. The next prime is 18528475489. The reversal of 18528475431 is 13457482581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18528475431 - 2⁶ = 18528475367 is a prime.

It is a super-2 number, since 2×18528475431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18528475331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11147470 + ... + 11149131.

It is an arithmetic number, because the mean of its divisors is an integer number (3099227678).

Almost surely, 2^18528475431 is an apocalyptic number.

18528475431 is a deficient number, since it is larger than the sum of its proper divisors (6265345993).

18528475431 is a wasteful number, since it uses less digits than its factorization.

18528475431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22296881.

The product of its digits is 1075200, while the sum is 48.

The spelling of 18528475431 in words is "eighteen billion, five hundred twenty-eight million, four hundred seventy-five thousand, four hundred thirty-one".