18706713641 has 16 divisors (see below), whose sum is σ = 23370593280. Its totient is φ = 14546699280.

The previous prime is 18706713607. The next prime is 18706713703. The reversal of 18706713641 is 14631760781.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18706713641 - 2¹⁸ = 18706451497 is a prime.

It is a super-2 number, since 2×18706713641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18706713592 and 18706713601.

It is not an unprimeable number, because it can be changed into a prime (18706713541) 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, 211931 + ... + 286928.

It is an arithmetic number, because the mean of its divisors is an integer number (1460662080).

Almost surely, 2^18706713641 is an apocalyptic number.

18706713641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18706713641 is a deficient number, since it is larger than the sum of its proper divisors (4663879639).

18706713641 is a wasteful number, since it uses less digits than its factorization.

18706713641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499364.

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 18706713641 in words is "eighteen billion, seven hundred six million, seven hundred thirteen thousand, six hundred forty-one".