18398680502 has 8 divisors (see below), whose sum is σ = 27716467896. Its totient is φ = 9159857872.

The previous prime is 18398680499. The next prime is 18398680523. The reversal of 18398680502 is 20508689381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18398680502² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19740608 + ... + 19741539.

It is an arithmetic number, because the mean of its divisors is an integer number (3464558487).

Almost surely, 2^18398680502 is an apocalyptic number.

18398680502 is a deficient number, since it is larger than the sum of its proper divisors (9317787394).

18398680502 is a wasteful number, since it uses less digits than its factorization.

18398680502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39482382.

The product of its (nonzero) digits is 829440, while the sum is 50.

The spelling of 18398680502 in words is "eighteen billion, three hundred ninety-eight million, six hundred eighty thousand, five hundred two".