18100875478 has 24 divisors (see below), whose sum is σ = 32957410032. Its totient is φ = 7420233744.

The previous prime is 18100875473. The next prime is 18100875491. The reversal of 18100875478 is 87457800181.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18100875473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4013025 + ... + 4017532.

It is an arithmetic number, because the mean of its divisors is an integer number (1373225418).

Almost surely, 2^18100875478 is an apocalyptic number.

18100875478 is a deficient number, since it is larger than the sum of its proper divisors (14856534554).

18100875478 is a wasteful number, since it uses less digits than its factorization.

18100875478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8030596 (or 8030589 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 49.

The spelling of 18100875478 in words is "eighteen billion, one hundred million, eight hundred seventy-five thousand, four hundred seventy-eight".