18238867745 has 64 divisors (see below), whose sum is σ = 25933602816. Its totient is φ = 12055599360.

The previous prime is 18238867723. The next prime is 18238867817. The reversal of 18238867745 is 54776883281.

It is not a de Polignac number, because 18238867745 - 2²² = 18234673441 is a prime.

It is a super-4 number, since 4×18238867745⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67301960 + ... + 67302230.

It is an arithmetic number, because the mean of its divisors is an integer number (405212544).

Almost surely, 2^18238867745 is an apocalyptic number.

It is an amenable number.

18238867745 is a deficient number, since it is larger than the sum of its proper divisors (7694735071).

18238867745 is a wasteful number, since it uses less digits than its factorization.

18238867745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 18063360, while the sum is 59.

The spelling of 18238867745 in words is "eighteen billion, two hundred thirty-eight million, eight hundred sixty-seven thousand, seven hundred forty-five".