18744746653 has 2 divisors, whose sum is σ = 18744746654. Its totient is φ = 18744746652.

The previous prime is 18744746621. The next prime is 18744746729. The reversal of 18744746653 is 35664744781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15664274649 + 3080472004 = 125157^2 + 55502^2 .

It is an emirp because it is prime and its reverse (35664744781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18744746653 - 2⁵ = 18744746621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18744746594 and 18744746603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18744744653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9372373326 + 9372373327.

It is an arithmetic number, because the mean of its divisors is an integer number (9372373327).

Almost surely, 2^18744746653 is an apocalyptic number.

It is an amenable number.

18744746653 is a deficient number, since it is larger than the sum of its proper divisors (1).

18744746653 is an equidigital number, since it uses as much as digits as its factorization.

18744746653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 55.

The spelling of 18744746653 in words is "eighteen billion, seven hundred forty-four million, seven hundred forty-six thousand, six hundred fifty-three".