18926169078 has 32 divisors (see below), whose sum is σ = 39959475840. Its totient is φ = 5959448640.

The previous prime is 18926169077. The next prime is 18926169083. The reversal of 18926169078 is 87096162981.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18926169077) 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, 199663 + ... + 278778.

It is an arithmetic number, because the mean of its divisors is an integer number (1248733620).

Almost surely, 2^18926169078 is an apocalyptic number.

18926169078 is an abundant number, since it is smaller than the sum of its proper divisors (21033306762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18926169078 is a wasteful number, since it uses less digits than its factorization.

18926169078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478812.

The product of its (nonzero) digits is 2612736, while the sum is 57.

The spelling of 18926169078 in words is "eighteen billion, nine hundred twenty-six million, one hundred sixty-nine thousand, seventy-eight".