1912500000 has 324 divisors, whose sum is σ = 7198238502. Its totient is φ = 480000000.

The previous prime is 1912499989. The next prime is 1912500001. The reversal of 1912500000 is 52191.

It can be written as a sum of positive squares in 9 ways, for example, as 1911088656 + 1411344 = 43716^2 + 1188^2 .

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912500001) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 112499992 + ... + 112500008.

Almost surely, 2^1912500000 is an apocalyptic number.

1912500000 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 1912500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3599119251).

1912500000 is an abundant number, since it is smaller than the sum of its proper divisors (5285738502).

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

1912500000 is an frugal number, since it uses more digits than its factorization.

1912500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1912500000 is about 43732.1392113398. The cubic root of 1912500000 is about 1241.2725403062.

Adding to 1912500000 its reverse (52191), we get a palindrome (1912552191).

The spelling of 1912500000 in words is "one billion, nine hundred twelve million, five hundred thousand".