21000204032 has 18 divisors (see below), whose sum is σ = 41918376528. Its totient is φ = 10500101888.

The previous prime is 21000204019. The next prime is 21000204041. The reversal of 21000204032 is 23040200012.

It is a junction number, because it is equal to n+sod(n) for n = 21000203998 and 21000204016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41015768 + ... + 41016279.

It is an arithmetic number, because the mean of its divisors is an integer number (2328798696).

Almost surely, 2^21000204032 is an apocalyptic number.

It is an amenable number.

21000204032 is a deficient number, since it is larger than the sum of its proper divisors (20918172496).

21000204032 is an frugal number, since it uses more digits than its factorization.

21000204032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82032063 (or 82032049 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21000204032 its reverse (23040200012), we get a palindrome (44040404044).

The spelling of 21000204032 in words is "twenty-one billion, two hundred four thousand, thirty-two".