19509228629 has 8 divisors (see below), whose sum is σ = 21285129888. Its totient is φ = 17733716560.

The previous prime is 19509228593. The next prime is 19509228631. The reversal of 19509228629 is 92682290591.

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 19509228629 - 2²⁰ = 19508180053 is a prime.

It is a super-2 number, since 2×19509228629² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19509228649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12959 + ... + 197955.

It is an arithmetic number, because the mean of its divisors is an integer number (2660641236).

Almost surely, 2^19509228629 is an apocalyptic number.

It is an amenable number.

19509228629 is a deficient number, since it is larger than the sum of its proper divisors (1775901259).

19509228629 is a wasteful number, since it uses less digits than its factorization.

19509228629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194595.

The product of its (nonzero) digits is 1399680, while the sum is 53.

The spelling of 19509228629 in words is "nineteen billion, five hundred nine million, two hundred twenty-eight thousand, six hundred twenty-nine".