19459016490 has 16 divisors (see below), whose sum is σ = 46701639648. Its totient is φ = 5189071056.

The previous prime is 19459016453. The next prime is 19459016491. The reversal of 19459016490 is 9461095491.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19459016491) 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, 324316912 + ... + 324316971.

It is an arithmetic number, because the mean of its divisors is an integer number (2918852478).

Almost surely, 2^19459016490 is an apocalyptic number.

19459016490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19459016490 is an abundant number, since it is smaller than the sum of its proper divisors (27242623158).

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

19459016490 is a wasteful number, since it uses less digits than its factorization.

19459016490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648633893.

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 19459016490 in words is "nineteen billion, four hundred fifty-nine million, sixteen thousand, four hundred ninety".