19545423363840 has 288 divisors, whose sum is σ = 68918502433536. Its totient is φ = 4681195847680.

The previous prime is 19545423363799. The next prime is 19545423363901. The reversal of 19545423363840 is 4836332454591.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 718432 + ... + 6293408.

It is an arithmetic number, because the mean of its divisors is an integer number (239300355672).

Almost surely, 2^{19545423363840} is an apocalyptic number.

19545423363840 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 19545423363840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34459251216768).

19545423363840 is an abundant number, since it is smaller than the sum of its proper divisors (49373079069696).

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

19545423363840 is a wasteful number, since it uses less digits than its factorization.

19545423363840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5575095 (or 5575081 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 57.

The spelling of 19545423363840 in words is "nineteen trillion, five hundred forty-five billion, four hundred twenty-three million, three hundred sixty-three thousand, eight hundred forty".