11938640442 has 32 divisors (see below), whose sum is σ = 24324917760. Its totient is φ = 3905179440.

The previous prime is 11938640419. The next prime is 11938640471. The reversal of 11938640442 is 24404683911.

11938640442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11938640442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11938640394 and 11938640403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172603 + ... + 231665.

It is an arithmetic number, because the mean of its divisors is an integer number (760153680).

Almost surely, 2^11938640442 is an apocalyptic number.

11938640442 is an abundant number, since it is smaller than the sum of its proper divisors (12386277318).

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

11938640442 is a wasteful number, since it uses less digits than its factorization.

11938640442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59698.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 11938640442 in words is "eleven billion, nine hundred thirty-eight million, six hundred forty thousand, four hundred forty-two".