21001133432 has 32 divisors (see below), whose sum is σ = 40000035600. Its totient is φ = 10335400704.

The previous prime is 21001133429. The next prime is 21001133467. The reversal of 21001133432 is 23433110012.

It is a congruent number.

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, 119828 + ... + 237404.

Almost surely, 2^21001133432 is an apocalyptic number.

It is an amenable number.

21001133432 is a deficient number, since it is larger than the sum of its proper divisors (18998902168).

21001133432 is a wasteful number, since it uses less digits than its factorization.

21001133432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117935 (or 117931 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21001133432 its reverse (23433110012), we get a palindrome (44434243444).

The spelling of 21001133432 in words is "twenty-one billion, one million, one hundred thirty-three thousand, four hundred thirty-two".