18729678151 has 2 divisors, whose sum is σ = 18729678152. Its totient is φ = 18729678150.

The previous prime is 18729678137. The next prime is 18729678157. The reversal of 18729678151 is 15187692781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18729678151 - 2¹¹ = 18729676103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18729678092 and 18729678101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18729678157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9364839075 + 9364839076.

It is an arithmetic number, because the mean of its divisors is an integer number (9364839076).

Almost surely, 2^18729678151 is an apocalyptic number.

18729678151 is a deficient number, since it is larger than the sum of its proper divisors (1).

18729678151 is an equidigital number, since it uses as much as digits as its factorization.

18729678151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 55.

The spelling of 18729678151 in words is "eighteen billion, seven hundred twenty-nine million, six hundred seventy-eight thousand, one hundred fifty-one".