21002242032 has 80 divisors (see below), whose sum is σ = 60322404000. Its totient is φ = 6996312576.

The previous prime is 21002242013. The next prime is 21002242043. The reversal of 21002242032 is 23024220012.

21002242032 is a `hidden beast` number, since 210 + 0 + 2 + 2 + 420 + 32 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21002241996 and 21002242014.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 706444 + ... + 735572.

It is an arithmetic number, because the mean of its divisors is an integer number (754030050).

Almost surely, 2^21002242032 is an apocalyptic number.

It is an amenable number.

21002242032 is an abundant number, since it is smaller than the sum of its proper divisors (39320161968).

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

21002242032 is a wasteful number, since it uses less digits than its factorization.

21002242032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30815 (or 30803 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 21002242032 its reverse (23024220012), we get a palindrome (44026462044).

The spelling of 21002242032 in words is "twenty-one billion, two million, two hundred forty-two thousand, thirty-two".