18857474743 has 2 divisors, whose sum is σ = 18857474744. Its totient is φ = 18857474742.

The previous prime is 18857474729. The next prime is 18857474767. The reversal of 18857474743 is 34747475881.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18857474743 - 2²¹ = 18855377591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18857474773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9428737371 + 9428737372.

It is an arithmetic number, because the mean of its divisors is an integer number (9428737372).

Almost surely, 2^18857474743 is an apocalyptic number.

18857474743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18857474743 is an equidigital number, since it uses as much as digits as its factorization.

18857474743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21073920, while the sum is 58.

The spelling of 18857474743 in words is "eighteen billion, eight hundred fifty-seven million, four hundred seventy-four thousand, seven hundred forty-three".