19855512151 has 16 divisors (see below), whose sum is σ = 22052487168. Its totient is φ = 17781385600.

The previous prime is 19855512143. The next prime is 19855512167. The reversal of 19855512151 is 15121555891.

It is a cyclic number.

It is not a de Polignac number, because 19855512151 - 2³ = 19855512143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19855512098 and 19855512107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19855512181) 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, 58255 + ... + 207616.

It is an arithmetic number, because the mean of its divisors is an integer number (1378280448).

Almost surely, 2^19855512151 is an apocalyptic number.

19855512151 is a deficient number, since it is larger than the sum of its proper divisors (2196975017).

19855512151 is a wasteful number, since it uses less digits than its factorization.

19855512151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266102.

The product of its digits is 90000, while the sum is 43.

The spelling of 19855512151 in words is "nineteen billion, eight hundred fifty-five million, five hundred twelve thousand, one hundred fifty-one".