18285278051 has 2 divisors, whose sum is σ = 18285278052. Its totient is φ = 18285278050.

The previous prime is 18285278029. The next prime is 18285278087. The reversal of 18285278051 is 15087258281.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18285278051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18285277987 and 18285278005.

It is not a weakly prime, because it can be changed into another prime (12285278051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9142639025 + 9142639026.

It is an arithmetic number, because the mean of its divisors is an integer number (9142639026).

Almost surely, 2^18285278051 is an apocalyptic number.

18285278051 is a deficient number, since it is larger than the sum of its proper divisors (1).

18285278051 is an equidigital number, since it uses as much as digits as its factorization.

18285278051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 358400, while the sum is 47.

The spelling of 18285278051 in words is "eighteen billion, two hundred eighty-five million, two hundred seventy-eight thousand, fifty-one".