11938732281 has 24 divisors (see below), whose sum is σ = 19711408704. Its totient is φ = 6821085600.

The previous prime is 11938732261. The next prime is 11938732301. The reversal of 11938732281 is 18223783911.

It is an interprime number because it is at equal distance from previous prime (11938732261) and next prime (11938732301).

It is not a de Polignac number, because 11938732281 - 2¹⁴ = 11938715897 is a prime.

It is a super-2 number, since 2×11938732281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11938732241) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 610995 + ... + 630231.

It is an arithmetic number, because the mean of its divisors is an integer number (821308696).

Almost surely, 2^11938732281 is an apocalyptic number.

It is an amenable number.

11938732281 is a deficient number, since it is larger than the sum of its proper divisors (7772676423).

11938732281 is a wasteful number, since it uses less digits than its factorization.

11938732281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29101 (or 29098 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The spelling of 11938732281 in words is "eleven billion, nine hundred thirty-eight million, seven hundred thirty-two thousand, two hundred eighty-one".