21421420132 has 12 divisors (see below), whose sum is σ = 42842840320. Its totient is φ = 9180608616.

The previous prime is 21421420099. The next prime is 21421420171. The reversal of 21421420132 is 23102412412.

21421420132 is an admirable 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 3 ways as a sum of consecutive naturals, for example, 382525332 + ... + 382525387.

Almost surely, 2^21421420132 is an apocalyptic number.

It is an amenable number.

21421420132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21421420132 is a wasteful number, since it uses less digits than its factorization.

21421420132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765050730 (or 765050728 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21421420132 its reverse (23102412412), we get a palindrome (44523832544).

The spelling of 21421420132 in words is "twenty-one billion, four hundred twenty-one million, four hundred twenty thousand, one hundred thirty-two".