18738711229 has 16 divisors (see below), whose sum is σ = 21507040768. Its totient is φ = 15993303552.

The previous prime is 18738711163. The next prime is 18738711241. The reversal of 18738711229 is 92211783781.

It is a cyclic number.

It is not a de Polignac number, because 18738711229 - 2¹¹ = 18738709181 is a prime.

It is a super-2 number, since 2×18738711229² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18738714229) 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, 5025964 + ... + 5029690.

It is an arithmetic number, because the mean of its divisors is an integer number (1344190048).

Almost surely, 2^18738711229 is an apocalyptic number.

It is an amenable number.

18738711229 is a deficient number, since it is larger than the sum of its proper divisors (2768329539).

18738711229 is a wasteful number, since it uses less digits than its factorization.

18738711229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6604.

The product of its digits is 338688, while the sum is 49.

The spelling of 18738711229 in words is "eighteen billion, seven hundred thirty-eight million, seven hundred eleven thousand, two hundred twenty-nine".