21113311432 has 32 divisors (see below), whose sum is σ = 42287103000. Its totient is φ = 9847742464.

The previous prime is 21113311379. The next prime is 21113311433. The reversal of 21113311432 is 23411331112.

It can be written as a sum of positive squares in 4 ways, for example, as 11112111396 + 10001200036 = 105414^2 + 100006^2 .

It is not an unprimeable number, because it can be changed into a prime (21113311433) 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, 671557 + ... + 702292.

Almost surely, 2^21113311432 is an apocalyptic number.

It is an amenable number.

21113311432 is an abundant number, since it is smaller than the sum of its proper divisors (21173791568).

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

21113311432 is a wasteful number, since it uses less digits than its factorization.

21113311432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373985 (or 1373981 counting only the distinct ones).

The product of its digits is 432, while the sum is 22.

Adding to 21113311432 its reverse (23411331112), we get a palindrome (44524642544).

The spelling of 21113311432 in words is "twenty-one billion, one hundred thirteen million, three hundred eleven thousand, four hundred thirty-two".