18861436452264 has 192 divisors, whose sum is σ = 56786675466240. Its totient is φ = 5215140262080.

The previous prime is 18861436452263. The next prime is 18861436452307. The reversal of 18861436452264 is 46225463416881.

It is a junction number, because it is equal to n+sod(n) for n = 18861436452198 and 18861436452207.

It is not an unprimeable number, because it can be changed into a prime (18861436452263) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11750217 + ... + 13258599.

It is an arithmetic number, because the mean of its divisors is an integer number (295763934720).

Almost surely, 2^{18861436452264} is an apocalyptic number.

18861436452264 is a gapful number since it is divisible by the number (14) 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 18861436452264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28393337733120).

18861436452264 is an abundant number, since it is smaller than the sum of its proper divisors (37925239013976).

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

18861436452264 is an equidigital number, since it uses as much as digits as its factorization.

18861436452264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508458 (or 1508426 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 60.

The spelling of 18861436452264 in words is "eighteen trillion, eight hundred sixty-one billion, four hundred thirty-six million, four hundred fifty-two thousand, two hundred sixty-four".