11938205943 has 12 divisors (see below), whose sum is σ = 17245022808. Its totient is φ = 7958366640.

The previous prime is 11938205899. The next prime is 11938205963. The reversal of 11938205943 is 34950283911.

It is a happy number.

11938205943 is a `hidden beast` number, since 1 + 1 + 9 + 38 + 20 + 594 + 3 = 666.

It is not a de Polignac number, because 11938205943 - 2⁶ = 11938205879 is a prime.

It is a super-2 number, since 2×11938205943² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11938205963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 297396 + ... + 335142.

It is an arithmetic number, because the mean of its divisors is an integer number (1437085234).

Almost surely, 2^11938205943 is an apocalyptic number.

11938205943 is a deficient number, since it is larger than the sum of its proper divisors (5306816865).

11938205943 is a wasteful number, since it uses less digits than its factorization.

11938205943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72894 (or 72891 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 11938205943 in words is "eleven billion, nine hundred thirty-eight million, two hundred five thousand, nine hundred forty-three".