19428556551 has 8 divisors (see below), whose sum is σ = 26604870384. Its totient is φ = 12602306880.

The previous prime is 19428556531. The next prime is 19428556613. The reversal of 19428556551 is 15565582491.

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

It is not a de Polignac number, because 19428556551 - 2⁵ = 19428556519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19428556494 and 19428556503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428556501) 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, 87515910 + ... + 87516131.

It is an arithmetic number, because the mean of its divisors is an integer number (3325608798).

Almost surely, 2^19428556551 is an apocalyptic number.

19428556551 is a deficient number, since it is larger than the sum of its proper divisors (7176313833).

19428556551 is a wasteful number, since it uses less digits than its factorization.

19428556551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175032081.

The product of its digits is 2160000, while the sum is 51.

The spelling of 19428556551 in words is "nineteen billion, four hundred twenty-eight million, five hundred fifty-six thousand, five hundred fifty-one".