21011432132 has 24 divisors (see below), whose sum is σ = 39134697336. Its totient is φ = 9836494848.

The previous prime is 21011432077. The next prime is 21011432159. The reversal of 21011432132 is 23123411012.

It can be written as a sum of positive squares in 4 ways, for example, as 7748224576 + 13263207556 = 88024^2 + 115166^2 .

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, 787373 + ... + 813620.

It is an arithmetic number, because the mean of its divisors is an integer number (1630612389).

Almost surely, 2^21011432132 is an apocalyptic number.

It is an amenable number.

21011432132 is a deficient number, since it is larger than the sum of its proper divisors (18123265204).

21011432132 is a wasteful number, since it uses less digits than its factorization.

21011432132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601207 (or 1601205 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21011432132 its reverse (23123411012), we get a palindrome (44134843144).

The spelling of 21011432132 in words is "twenty-one billion, eleven million, four hundred thirty-two thousand, one hundred thirty-two".