18629738819 has 4 divisors (see below), whose sum is σ = 18643993944. Its totient is φ = 18615483696.

The previous prime is 18629738797. The next prime is 18629738837. The reversal of 18629738819 is 91883792681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91883792681 = 587 ⋅156531163.

It is a cyclic number.

It is not a de Polignac number, because 18629738819 - 2¹² = 18629734723 is a prime.

It is a super-2 number, since 2×18629738819² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18629738879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7125602 + ... + 7128215.

It is an arithmetic number, because the mean of its divisors is an integer number (4660998486).

Almost surely, 2^18629738819 is an apocalyptic number.

18629738819 is a deficient number, since it is larger than the sum of its proper divisors (14255125).

18629738819 is a wasteful number, since it uses less digits than its factorization.

18629738819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14255124.

The product of its digits is 10450944, while the sum is 62.

The spelling of 18629738819 in words is "eighteen billion, six hundred twenty-nine million, seven hundred thirty-eight thousand, eight hundred nineteen".