19155404012 has 12 divisors (see below), whose sum is σ = 33601584576. Its totient is φ = 9554951280.

The previous prime is 19155404011. The next prime is 19155404039. The reversal of 19155404012 is 21040455191.

It is a super-2 number, since 2×19155404012² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19155404012.

It is not an unprimeable number, because it can be changed into a prime (19155404011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5685788 + ... + 5689155.

It is an arithmetic number, because the mean of its divisors is an integer number (2800132048).

Almost surely, 2^19155404012 is an apocalyptic number.

It is an amenable number.

19155404012 is a deficient number, since it is larger than the sum of its proper divisors (14446180564).

19155404012 is a wasteful number, since it uses less digits than its factorization.

19155404012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11375368 (or 11375366 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 19155404012 in words is "nineteen billion, one hundred fifty-five million, four hundred four thousand, twelve".