18386719051 has 8 divisors (see below), whose sum is σ = 18570459600. Its totient is φ = 18203783328.

The previous prime is 18386719037. The next prime is 18386719073. The reversal of 18386719051 is 15091768381.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18386719051 - 2¹⁹ = 18386194763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18386718986 and 18386719004.

It is not an unprimeable number, because it can be changed into a prime (18386719151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155236 + ... + 246721.

It is an arithmetic number, because the mean of its divisors is an integer number (2321307450).

Almost surely, 2^18386719051 is an apocalyptic number.

18386719051 is a deficient number, since it is larger than the sum of its proper divisors (183740549).

18386719051 is a wasteful number, since it uses less digits than its factorization.

18386719051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402413.

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 18386719051 in words is "eighteen billion, three hundred eighty-six million, seven hundred nineteen thousand, fifty-one".