1920187500 has 504 divisors, whose sum is σ = 7481154240. Its totient is φ = 378000000.

The previous prime is 1920187471. The next prime is 1920187517. The reversal of 1920187500 is 57810291.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 101062491 + ... + 101062509.

It is an arithmetic number, because the mean of its divisors is an integer number (14843560).

Almost surely, 2^1920187500 is an apocalyptic number.

1920187500 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 1920187500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3740577120).

1920187500 is an abundant number, since it is smaller than the sum of its proper divisors (5560966740).

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

1920187500 is a wasteful number, since it uses less digits than its factorization.

1920187500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 1920187500 is about 43819.9440894212. The cubic root of 1920187500 is about 1242.9334598212.

Adding to 1920187500 its reverse (57810291), we get a palindrome (1977997791).

It can be divided in two parts, 1920 and 187500, that added together give a triangular number (189420 = T₆₁₅).

The spelling of 1920187500 in words is "one billion, nine hundred twenty million, one hundred eighty-seven thousand, five hundred".