11431323402 has 16 divisors (see below), whose sum is σ = 23064972480. Its totient is φ = 3776720192.

The previous prime is 11431323361. The next prime is 11431323461. The reversal of 11431323402 is 20432313411.

It is a happy number.

It is a super-2 number, since 2×11431323402² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8429502 + ... + 8430857.

It is an arithmetic number, because the mean of its divisors is an integer number (1441560780).

Almost surely, 2^11431323402 is an apocalyptic number.

11431323402 is an abundant number, since it is smaller than the sum of its proper divisors (11633649078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11431323402 is a wasteful number, since it uses less digits than its factorization.

11431323402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16860477.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 11431323402 its reverse (20432313411), we get a palindrome (31863636813).

Subtracting 11431323402 from its reverse (20432313411), we obtain a palindrome (9000990009).

The spelling of 11431323402 in words is "eleven billion, four hundred thirty-one million, three hundred twenty-three thousand, four hundred two".