19498290623 has 4 divisors (see below), whose sum is σ = 22283760720. Its totient is φ = 16712820528.

The previous prime is 19498290619. The next prime is 19498290629. The reversal of 19498290623 is 32609289491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19498290623 - 2² = 19498290619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19498290629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1392735038 + ... + 1392735051.

It is an arithmetic number, because the mean of its divisors is an integer number (5570940180).

Almost surely, 2^19498290623 is an apocalyptic number.

19498290623 is a deficient number, since it is larger than the sum of its proper divisors (2785470097).

19498290623 is an equidigital number, since it uses as much as digits as its factorization.

19498290623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2785470096.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 19498290623 in words is "nineteen billion, four hundred ninety-eight million, two hundred ninety thousand, six hundred twenty-three".