18772909741 has 4 divisors (see below), whose sum is σ = 19589123232. Its totient is φ = 17956696252.

The previous prime is 18772909699. The next prime is 18772909747. The reversal of 18772909741 is 14790927781.

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 not a de Polignac number, because 18772909741 - 2⁷ = 18772909613 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 (18772909747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408106711 + ... + 408106756.

It is an arithmetic number, because the mean of its divisors is an integer number (4897280808).

Almost surely, 2^18772909741 is an apocalyptic number.

It is an amenable number.

18772909741 is a deficient number, since it is larger than the sum of its proper divisors (816213491).

18772909741 is an equidigital number, since it uses as much as digits as its factorization.

18772909741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816213490.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The spelling of 18772909741 in words is "eighteen billion, seven hundred seventy-two million, nine hundred nine thousand, seven hundred forty-one".