21033250432 has 32 divisors (see below), whose sum is σ = 41912942400. Its totient is φ = 10513923840.

The previous prime is 21033250429. The next prime is 21033250501. The reversal of 21033250432 is 23405233012.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 21033250397 and 21033250406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536457 + ... + 574327.

It is an arithmetic number, because the mean of its divisors is an integer number (1309779450).

Almost surely, 2^21033250432 is an apocalyptic number.

It is an amenable number.

21033250432 is a deficient number, since it is larger than the sum of its proper divisors (20879691968).

21033250432 is an equidigital number, since it uses as much as digits as its factorization.

21033250432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42224 (or 42212 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21033250432 its reverse (23405233012), we get a palindrome (44438483444).

The spelling of 21033250432 in words is "twenty-one billion, thirty-three million, two hundred fifty thousand, four hundred thirty-two".