18750501442 has 4 divisors (see below), whose sum is σ = 28125752166. Its totient is φ = 9375250720.

The previous prime is 18750501391. The next prime is 18750501449. The reversal of 18750501442 is 24410505781.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14565834721 + 4184666721 = 120689^2 + 64689^2 .

It is a super-3 number, since 3×18750501442³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (18750501449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4687625359 + ... + 4687625362.

Almost surely, 2^18750501442 is an apocalyptic number.

18750501442 is a deficient number, since it is larger than the sum of its proper divisors (9375250724).

18750501442 is an equidigital number, since it uses as much as digits as its factorization.

18750501442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9375250723.

The product of its (nonzero) digits is 44800, while the sum is 37.

The spelling of 18750501442 in words is "eighteen billion, seven hundred fifty million, five hundred one thousand, four hundred forty-two".