18005741551 has 16 divisors (see below), whose sum is σ = 21065873920. Its totient is φ = 15071222880.

The previous prime is 18005741549. The next prime is 18005741561. The reversal of 18005741551 is 15514750081.

It is not a de Polignac number, because 18005741551 - 2¹ = 18005741549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18005741551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18005741561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92331 + ... + 211036.

It is an arithmetic number, because the mean of its divisors is an integer number (1316617120).

Almost surely, 2^18005741551 is an apocalyptic number.

18005741551 is a deficient number, since it is larger than the sum of its proper divisors (3060132369).

18005741551 is a wasteful number, since it uses less digits than its factorization.

18005741551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303574.

The product of its (nonzero) digits is 28000, while the sum is 37.

The spelling of 18005741551 in words is "eighteen billion, five million, seven hundred forty-one thousand, five hundred fifty-one".