19012253678 has 16 divisors (see below), whose sum is σ = 31951798704. Its totient is φ = 8408367360.

The previous prime is 19012253653. The next prime is 19012253693. The reversal of 19012253678 is 87635221091.

It is a super-2 number, since 2×19012253678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11677475 + ... + 11679102.

It is an arithmetic number, because the mean of its divisors is an integer number (1996987419).

Almost surely, 2^19012253678 is an apocalyptic number.

19012253678 is a deficient number, since it is larger than the sum of its proper divisors (12939545026).

19012253678 is a wasteful number, since it uses less digits than its factorization.

19012253678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23356627.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 19012253678 in words is "nineteen billion, twelve million, two hundred fifty-three thousand, six hundred seventy-eight".