18206723051 has 4 divisors (see below), whose sum is σ = 19861879704. Its totient is φ = 16551566400.

The previous prime is 18206723027. The next prime is 18206723149. The reversal of 18206723051 is 15032760281.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18206723051 - 2²⁶ = 18139614187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18206723021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827578310 + ... + 827578331.

It is an arithmetic number, because the mean of its divisors is an integer number (4965469926).

Almost surely, 2^18206723051 is an apocalyptic number.

18206723051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18206723051 is a deficient number, since it is larger than the sum of its proper divisors (1655156653).

18206723051 is a wasteful number, since it uses less digits than its factorization.

18206723051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655156652.

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 18206723051 in words is "eighteen billion, two hundred six million, seven hundred twenty-three thousand, fifty-one".