1871420250000 has 420 divisors, whose sum is σ = 7029809079792. Its totient is φ = 427744800000.

The previous prime is 1871420249983. The next prime is 1871420250047. The reversal of 1871420250000 is 520241781.

It is a tau number, because it is divible by the number of its divisors (420).

It is a super-2 number, since 2×1871420250000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 1871420250000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 36724539 + ... + 36775461.

Almost surely, 2^{1871420250000} is an apocalyptic number.

1871420250000 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 1871420250000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3514904539896).

1871420250000 is an abundant number, since it is smaller than the sum of its proper divisors (5158388829792).

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

1871420250000 is an frugal number, since it uses more digits than its factorization.

1871420250000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50978 (or 50940 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

Adding to 1871420250000 its reverse (520241781), we get a palindrome (1871940491781).

The spelling of 1871420250000 in words is "one trillion, eight hundred seventy-one billion, four hundred twenty million, two hundred fifty thousand".