11531423426 has 16 divisors (see below), whose sum is σ = 17397319968. Its totient is φ = 5732400000.

The previous prime is 11531423413. The next prime is 11531423429. The reversal of 11531423426 is 62432413511.

It is a junction number, because it is equal to n+sod(n) for n = 11531423392 and 11531423401.

It is not an unprimeable number, because it can be changed into a prime (11531423429) 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, 262226 + ... + 303026.

It is an arithmetic number, because the mean of its divisors is an integer number (1087332498).

Almost surely, 2^11531423426 is an apocalyptic number.

11531423426 is a deficient number, since it is larger than the sum of its proper divisors (5865896542).

11531423426 is a wasteful number, since it uses less digits than its factorization.

11531423426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41617.

The product of its digits is 17280, while the sum is 32.

Adding to 11531423426 its reverse (62432413511), we get a palindrome (73963836937).

The spelling of 11531423426 in words is "eleven billion, five hundred thirty-one million, four hundred twenty-three thousand, four hundred twenty-six".