11420432231 has 4 divisors (see below), whose sum is σ = 12298927032. Its totient is φ = 10541937432.

The previous prime is 11420432197. The next prime is 11420432273. The reversal of 11420432231 is 13223402411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13223402411 = 16001 ⋅826411.

It is a de Polignac number, because none of the positive numbers 2^k-11420432231 is a prime.

It is a super-2 number, since 2×11420432231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11420432197 and 11420432206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11420432531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439247381 + ... + 439247406.

It is an arithmetic number, because the mean of its divisors is an integer number (3074731758).

Almost surely, 2^11420432231 is an apocalyptic number.

11420432231 is a deficient number, since it is larger than the sum of its proper divisors (878494801).

11420432231 is an equidigital number, since it uses as much as digits as its factorization.

11420432231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878494800.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 11420432231 its reverse (13223402411), we get a palindrome (24643834642).

The spelling of 11420432231 in words is "eleven billion, four hundred twenty million, four hundred thirty-two thousand, two hundred thirty-one".