19775439133 has 4 divisors (see below), whose sum is σ = 19795890400. Its totient is φ = 19754987868.

The previous prime is 19775439109. The next prime is 19775439139. The reversal of 19775439133 is 33193457791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19775439133 - 2²¹ = 19773341981 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 (19775439139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10224183 + ... + 10226116.

It is an arithmetic number, because the mean of its divisors is an integer number (4948972600).

Almost surely, 2^19775439133 is an apocalyptic number.

It is an amenable number.

19775439133 is a deficient number, since it is larger than the sum of its proper divisors (20451267).

19775439133 is an equidigital number, since it uses as much as digits as its factorization.

19775439133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20451266.

The product of its digits is 2143260, while the sum is 52.

The spelling of 19775439133 in words is "nineteen billion, seven hundred seventy-five million, four hundred thirty-nine thousand, one hundred thirty-three".