18742629973 has 4 divisors (see below), whose sum is σ = 18743056480. Its totient is φ = 18742203468.

The previous prime is 18742629959. The next prime is 18742630003. The reversal of 18742629973 is 37992624781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18742629973 - 2²¹ = 18740532821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18742629923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138633 + ... + 238126.

It is an arithmetic number, because the mean of its divisors is an integer number (4685764120).

Almost surely, 2^18742629973 is an apocalyptic number.

It is an amenable number.

18742629973 is a deficient number, since it is larger than the sum of its proper divisors (426507).

18742629973 is an equidigital number, since it uses as much as digits as its factorization.

18742629973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426506.

The product of its digits is 9144576, while the sum is 58.

The spelling of 18742629973 in words is "eighteen billion, seven hundred forty-two million, six hundred twenty-nine thousand, nine hundred seventy-three".