11938782431 has 8 divisors (see below), whose sum is σ = 12476387040. Its totient is φ = 11402721792.

The previous prime is 11938782421. The next prime is 11938782433. The reversal of 11938782431 is 13428783911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11938782431 is a prime.

It is a super-2 number, since 2×11938782431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11938782433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370166 + ... + 401123.

It is an arithmetic number, because the mean of its divisors is an integer number (1559548380).

Almost surely, 2^11938782431 is an apocalyptic number.

11938782431 is a deficient number, since it is larger than the sum of its proper divisors (537604609).

11938782431 is an equidigital number, since it uses as much as digits as its factorization.

11938782431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771985.

The product of its digits is 290304, while the sum is 47.

The spelling of 11938782431 in words is "eleven billion, nine hundred thirty-eight million, seven hundred eighty-two thousand, four hundred thirty-one".