18466818738351 has 16 divisors (see below), whose sum is σ = 25694599773696. Its totient is φ = 11775193204896.

The previous prime is 18466818738337. The next prime is 18466818738427. The reversal of 18466818738351 is 15383781866481.

It is not a de Polignac number, because 18466818738351 - 2¹³ = 18466818730159 is a prime.

It is a super-2 number, since 2×18466818738351² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18466818738331) 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, 7419955 + ... + 9591108.

It is an arithmetic number, because the mean of its divisors is an integer number (1605912485856).

Almost surely, 2^{18466818738351} is an apocalyptic number.

18466818738351 is a deficient number, since it is larger than the sum of its proper divisors (7227781035345).

18466818738351 is a wasteful number, since it uses less digits than its factorization.

18466818738351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17026822.

The product of its digits is 185794560, while the sum is 69.

The spelling of 18466818738351 in words is "eighteen trillion, four hundred sixty-six billion, eight hundred eighteen million, seven hundred thirty-eight thousand, three hundred fifty-one".