19489064830 has 16 divisors (see below), whose sum is σ = 35502972624. Its totient is φ = 7701702400.

The previous prime is 19489064821. The next prime is 19489064831. The reversal of 19489064830 is 3846098491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19489064831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11739571 + ... + 11741230.

It is an arithmetic number, because the mean of its divisors is an integer number (2218935789).

Almost surely, 2^19489064830 is an apocalyptic number.

19489064830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19489064830 is a deficient number, since it is larger than the sum of its proper divisors (16013907794).

19489064830 is a wasteful number, since it uses less digits than its factorization.

19489064830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23480891.

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 19489064830 in words is "nineteen billion, four hundred eighty-nine million, sixty-four thousand, eight hundred thirty".