19479477253 has 8 divisors (see below), whose sum is σ = 19538415000. Its totient is φ = 19420585728.

The previous prime is 19479477247. The next prime is 19479477287. The reversal of 19479477253 is 35277497491.

It can be written as a sum of positive squares in 4 ways, for example, as 1450238724 + 18029238529 = 38082^2 + 134273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19479477253 - 2⁵ = 19479477221 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 (19479477203) 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, 951873 + ... + 972121.

It is an arithmetic number, because the mean of its divisors is an integer number (2442301875).

Almost surely, 2^19479477253 is an apocalyptic number.

It is an amenable number.

19479477253 is a deficient number, since it is larger than the sum of its proper divisors (58937747).

19479477253 is a wasteful number, since it uses less digits than its factorization.

19479477253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23111.

The product of its digits is 13335840, while the sum is 58.

The spelling of 19479477253 in words is "nineteen billion, four hundred seventy-nine million, four hundred seventy-seven thousand, two hundred fifty-three".