18696957719820 has 192 divisors, whose sum is σ = 55008621158400. Its totient is φ = 4739958466560.

The previous prime is 18696957719819. The next prime is 18696957719849. The reversal of 18696957719820 is 2891775969681.

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, 26123901 + ... + 26830059.

It is an arithmetic number, because the mean of its divisors is an integer number (286503235200).

Almost surely, 2^{18696957719820} is an apocalyptic number.

18696957719820 is a gapful number since it is divisible by the number (10) 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 18696957719820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27504310579200).

18696957719820 is an abundant number, since it is smaller than the sum of its proper divisors (36311663438580).

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

18696957719820 is a wasteful number, since it uses less digits than its factorization.

18696957719820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706488 (or 706486 counting only the distinct ones).

The product of its (nonzero) digits is 823011840, while the sum is 78.

The spelling of 18696957719820 in words is "eighteen trillion, six hundred ninety-six billion, nine hundred fifty-seven million, seven hundred nineteen thousand, eight hundred twenty".