19499075380 has 12 divisors (see below), whose sum is σ = 40948058340. Its totient is φ = 7799630144.

The previous prime is 19499075371. The next prime is 19499075411. The reversal of 19499075380 is 8357099491.

It can be written as a sum of positive squares in 2 ways, for example, as 8001660304 + 11497415076 = 89452^2 + 107226^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487476865 + ... + 487476904.

It is an arithmetic number, because the mean of its divisors is an integer number (3412338195).

Almost surely, 2^19499075380 is an apocalyptic number.

19499075380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19499075380 is an abundant number, since it is smaller than the sum of its proper divisors (21448982960).

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

19499075380 is a wasteful number, since it uses less digits than its factorization.

19499075380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974953778 (or 974953776 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 19499075380 in words is "nineteen billion, four hundred ninety-nine million, seventy-five thousand, three hundred eighty".