18789304340 has 12 divisors (see below), whose sum is σ = 39457539156. Its totient is φ = 7515721728.

The previous prime is 18789304337. The next prime is 18789304357. The reversal of 18789304340 is 4340398781.

It can be written as a sum of positive squares in 2 ways, for example, as 14385123844 + 4404180496 = 119938^2 + 66364^2 .

It is a super-2 number, since 2×18789304340² (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, 469732589 + ... + 469732628.

It is an arithmetic number, because the mean of its divisors is an integer number (3288128263).

Almost surely, 2^18789304340 is an apocalyptic number.

18789304340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18789304340 is an abundant number, since it is smaller than the sum of its proper divisors (20668234816).

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

18789304340 is a wasteful number, since it uses less digits than its factorization.

18789304340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939465226 (or 939465224 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 18789304340 in words is "eighteen billion, seven hundred eighty-nine million, three hundred four thousand, three hundred forty".