12186821453730 has 128 divisors (see below), whose sum is σ = 36654443882496. Its totient is φ = 2519205580800.

The previous prime is 12186821453699. The next prime is 12186821453743. The reversal of 12186821453730 is 3735412868121.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13221736 + ... + 14113395.

It is an arithmetic number, because the mean of its divisors is an integer number (286362842832).

Almost surely, 2^{12186821453730} is an apocalyptic number.

12186821453730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12186821453730 is an abundant number, since it is smaller than the sum of its proper divisors (24467622428766).

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

12186821453730 is a wasteful number, since it uses less digits than its factorization.

12186821453730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27335352.

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 12186821453730 in words is "twelve trillion, one hundred eighty-six billion, eight hundred twenty-one million, four hundred fifty-three thousand, seven hundred thirty".