19903002084 has 81 divisors (see below), whose sum is σ = 58541732067. Its totient is φ = 5684879088.

The previous prime is 19903002071. The next prime is 19903002107. The reversal of 19903002084 is 48020030991.

The square root of 19903002084 is 141078.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×19903002084² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 5923597 + ... + 5926955.

Almost surely, 2^19903002084 is an apocalyptic number.

19903002084 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19903002084 is the 141078-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19903002084

19903002084 is an abundant number, since it is smaller than the sum of its proper divisors (38638729983).

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

19903002084 is an equidigital number, since it uses as much as digits as its factorization.

19903002084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6742 (or 3371 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

Multiplying 19903002084 by its sum of digits (36), we get a square (716508075024 = 846468²).

19903002084 divided by its sum of digits (36) gives a square (552861169 = 23513²).

The spelling of 19903002084 in words is "nineteen billion, nine hundred three million, two thousand, eighty-four".