1903145487684 has 384 divisors, whose sum is σ = 5475988869120. Its totient is φ = 503097993216.

The previous prime is 1903145487667. The next prime is 1903145487779. The reversal of 1903145487684 is 4867845413091.

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, 984554382 + ... + 984556314.

It is an arithmetic number, because the mean of its divisors is an integer number (14260387680).

Almost surely, 2^{1903145487684} is an apocalyptic number.

1903145487684 is a gapful number since it is divisible by the number (14) 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 1903145487684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2737994434560).

1903145487684 is an abundant number, since it is smaller than the sum of its proper divisors (3572843381436).

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

1903145487684 is a wasteful number, since it uses less digits than its factorization.

1903145487684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219 (or 2217 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 1903145487684 in words is "one trillion, nine hundred three billion, one hundred forty-five million, four hundred eighty-seven thousand, six hundred eighty-four".