11923256142 has 144 divisors (see below), whose sum is σ = 30998579040. Its totient is φ = 3300103296.

The previous prime is 11923256113. The next prime is 11923256167. The reversal of 11923256142 is 24165232911.

11923256142 is a `hidden beast` number, since 1 + 1 + 9 + 2 + 32 + 5 + 614 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 11923256097 and 11923256106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9038959 + ... + 9040277.

It is an arithmetic number, because the mean of its divisors is an integer number (215267910).

Almost surely, 2^11923256142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11923256142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15499289520).

11923256142 is an abundant number, since it is smaller than the sum of its proper divisors (19075322898).

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

11923256142 is a wasteful number, since it uses less digits than its factorization.

11923256142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655 (or 1645 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 11923256142 in words is "eleven billion, nine hundred twenty-three million, two hundred fifty-six thousand, one hundred forty-two".