19408780253 has 8 divisors (see below), whose sum is σ = 20634766848. Its totient is φ = 18214637584.

The previous prime is 19408780249. The next prime is 19408780267. The reversal of 19408780253 is 35208780491.

It is a happy number.

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 19408780253 - 2² = 19408780249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19408780198 and 19408780207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19408780753) 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, 7959725 + ... + 7962162.

It is an arithmetic number, because the mean of its divisors is an integer number (2579345856).

Almost surely, 2^19408780253 is an apocalyptic number.

It is an amenable number.

19408780253 is a deficient number, since it is larger than the sum of its proper divisors (1225986595).

19408780253 is a wasteful number, since it uses less digits than its factorization.

19408780253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15921963.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 19408780253 in words is "nineteen billion, four hundred eight million, seven hundred eighty thousand, two hundred fifty-three".