19490543553 has 16 divisors (see below), whose sum is σ = 27998786816. Its totient is φ = 11988881280.

The previous prime is 19490543549. The next prime is 19490543573. The reversal of 19490543553 is 35534509491.

It is not a de Polignac number, because 19490543553 - 2² = 19490543549 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19490543573) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20068 + ... + 198453.

It is an arithmetic number, because the mean of its divisors is an integer number (1749924176).

Almost surely, 2^19490543553 is an apocalyptic number.

19490543553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19490543553 is a deficient number, since it is larger than the sum of its proper divisors (8508243263).

19490543553 is a wasteful number, since it uses less digits than its factorization.

19490543553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220824.

The product of its (nonzero) digits is 1458000, while the sum is 48.

The spelling of 19490543553 in words is "nineteen billion, four hundred ninety million, five hundred forty-three thousand, five hundred fifty-three".