11854071138 has 32 divisors (see below), whose sum is σ = 29179253376. Its totient is φ = 3126348288.

The previous prime is 11854071127. The next prime is 11854071157. The reversal of 11854071138 is 83117045811.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11854071096 and 11854071105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10854831 + ... + 10855922.

It is an arithmetic number, because the mean of its divisors is an integer number (911851668).

Almost surely, 2^11854071138 is an apocalyptic number.

11854071138 is an abundant number, since it is smaller than the sum of its proper divisors (17325182238).

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

11854071138 is a wasteful number, since it uses less digits than its factorization.

11854071138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21710778.

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 11854071138 in words is "eleven billion, eight hundred fifty-four million, seventy-one thousand, one hundred thirty-eight".