18996868869 has 16 divisors (see below), whose sum is σ = 27753546240. Its totient is φ = 11462530160.

The previous prime is 18996868867. The next prime is 18996868879. The reversal of 18996868869 is 96886869981.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 18996868869 - 2¹ = 18996868867 is a prime.

It is a super-2 number, since 2×18996868869² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18996868794 and 18996868803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18996868867) 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, 1260489 + ... + 1275470.

It is an arithmetic number, because the mean of its divisors is an integer number (1734596640).

Almost surely, 2^18996868869 is an apocalyptic number.

It is an amenable number.

18996868869 is a deficient number, since it is larger than the sum of its proper divisors (8756677371).

18996868869 is a wasteful number, since it uses less digits than its factorization.

18996868869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536200.

The product of its digits is 644972544, while the sum is 78.

The spelling of 18996868869 in words is "eighteen billion, nine hundred ninety-six million, eight hundred sixty-eight thousand, eight hundred sixty-nine".