18709988622733 has 2 divisors, whose sum is σ = 18709988622734. Its totient is φ = 18709988622732.

The previous prime is 18709988622667. The next prime is 18709988622739. The reversal of 18709988622733 is 33722688990781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16826059433764 + 1883929188969 = 4101958^2 + 1372563^2 .

It is a cyclic number.

It is not a de Polignac number, because 18709988622733 - 2²⁹ = 18709451751821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18709988622739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9354994311366 + 9354994311367.

It is an arithmetic number, because the mean of its divisors is an integer number (9354994311367).

Almost surely, 2^{18709988622733} is an apocalyptic number.

It is an amenable number.

18709988622733 is a deficient number, since it is larger than the sum of its proper divisors (1).

18709988622733 is an equidigital number, since it uses as much as digits as its factorization.

18709988622733 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 438939648, while the sum is 73.

The spelling of 18709988622733 in words is "eighteen trillion, seven hundred nine billion, nine hundred eighty-eight million, six hundred twenty-two thousand, seven hundred thirty-three".