18246263989 has 4 divisors (see below), whose sum is σ = 18691294860. Its totient is φ = 17801233120.

The previous prime is 18246263983. The next prime is 18246264037. The reversal of 18246263989 is 98936264281.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5134868964 + 13111395025 = 71658^2 + 114505^2 .

It is a cyclic number.

It is not a de Polignac number, because 18246263989 - 2⁵ = 18246263957 is a prime.

It is a super-2 number, since 2×18246263989² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18246263983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222515374 + ... + 222515455.

It is an arithmetic number, because the mean of its divisors is an integer number (4672823715).

Almost surely, 2^18246263989 is an apocalyptic number.

It is an amenable number.

18246263989 is a deficient number, since it is larger than the sum of its proper divisors (445030871).

18246263989 is an equidigital number, since it uses as much as digits as its factorization.

18246263989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445030870.

The product of its digits is 8957952, while the sum is 58.

The spelling of 18246263989 in words is "eighteen billion, two hundred forty-six million, two hundred sixty-three thousand, nine hundred eighty-nine".