11990534842 has 16 divisors (see below), whose sum is σ = 21130173792. Its totient is φ = 5030993520.

The previous prime is 11990534813. The next prime is 11990534849. The reversal of 11990534842 is 24843509911.

It is a junction number, because it is equal to n+sod(n) for n = 11990534792 and 11990534801.

It is not an unprimeable number, because it can be changed into a prime (11990534849) 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, 20962188 + ... + 20962759.

It is an arithmetic number, because the mean of its divisors is an integer number (1320635862).

Almost surely, 2^11990534842 is an apocalyptic number.

11990534842 is a deficient number, since it is larger than the sum of its proper divisors (9139638950).

11990534842 is a wasteful number, since it uses less digits than its factorization.

11990534842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41924973.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 11990534842 in words is "eleven billion, nine hundred ninety million, five hundred thirty-four thousand, eight hundred forty-two".