11420031402 has 56 divisors (see below), whose sum is σ = 27659007684. Its totient is φ = 3513849984.

The previous prime is 11420031353. The next prime is 11420031409. The reversal of 11420031402 is 20413002411.

It can be written as a sum of positive squares in 2 ways, for example, as 11127929121 + 292102281 = 105489^2 + 17091^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (11420031409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 282303 + ... + 320210.

Almost surely, 2^11420031402 is an apocalyptic number.

11420031402 is an abundant number, since it is smaller than the sum of its proper divisors (16238976282).

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

11420031402 is an equidigital number, since it uses as much as digits as its factorization.

11420031402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602546 (or 602531 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 11420031402 its reverse (20413002411), we get a palindrome (31833033813).

The spelling of 11420031402 in words is "eleven billion, four hundred twenty million, thirty-one thousand, four hundred two".