18693339948 has 96 divisors (see below), whose sum is σ = 50932062720. Its totient is φ = 5921657280.

The previous prime is 18693339947. The next prime is 18693339949. The reversal of 18693339948 is 84993339681.

It is an interprime number because it is at equal distance from previous prime (18693339947) and next prime (18693339949).

It is a super-2 number, since 2×18693339948² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18693339947) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117433 + ... + 226223.

It is an arithmetic number, because the mean of its divisors is an integer number (530542320).

Almost surely, 2^18693339948 is an apocalyptic number.

18693339948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18693339948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25466031360).

18693339948 is an abundant number, since it is smaller than the sum of its proper divisors (32238722772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18693339948 is a wasteful number, since it uses less digits than its factorization.

18693339948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108884 (or 108876 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The spelling of 18693339948 in words is "eighteen billion, six hundred ninety-three million, three hundred thirty-nine thousand, nine hundred forty-eight".