19051819252 has 24 divisors (see below), whose sum is σ = 34193196576. Its totient is φ = 9283336608.

The previous prime is 19051819249. The next prime is 19051819261. The reversal of 19051819252 is 25291815091.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 19051819199 and 19051819208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48823 + ... + 201214.

It is an arithmetic number, because the mean of its divisors is an integer number (1424716524).

Almost surely, 2^19051819252 is an apocalyptic number.

It is an amenable number.

19051819252 is a deficient number, since it is larger than the sum of its proper divisors (15141377324).

19051819252 is a wasteful number, since it uses less digits than its factorization.

19051819252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250527 (or 250525 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 43.

The spelling of 19051819252 in words is "nineteen billion, fifty-one million, eight hundred nineteen thousand, two hundred fifty-two".