19850123489280 has 1664 divisors, whose sum is σ = 78291587874816. Its totient is φ = 4196479795200.

The previous prime is 19850123489263. The next prime is 19850123489291. The reversal of 19850123489280 is 8298432105891.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 40427949835 + ... + 40427950325.

Almost surely, 2^{19850123489280} is an apocalyptic number.

19850123489280 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 19850123489280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39145793937408).

19850123489280 is an abundant number, since it is smaller than the sum of its proper divisors (58441464385536).

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

19850123489280 is a wasteful number, since it uses less digits than its factorization.

19850123489280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 19850123489280 in words is "nineteen trillion, eight hundred fifty billion, one hundred twenty-three million, four hundred eighty-nine thousand, two hundred eighty".