21432301536 has 48 divisors (see below), whose sum is σ = 56400191568. Its totient is φ = 7126272000.

The previous prime is 21432301519. The next prime is 21432301537. The reversal of 21432301536 is 63510323412.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21432301537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239875 + ... + 316866.

It is an arithmetic number, because the mean of its divisors is an integer number (1175003991).

Almost surely, 2^21432301536 is an apocalyptic number.

It is an amenable number.

21432301536 is an abundant number, since it is smaller than the sum of its proper divisors (34967890032).

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

21432301536 is a wasteful number, since it uses less digits than its factorization.

21432301536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557155 (or 557147 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 21432301536 its reverse (63510323412), we get a palindrome (84942624948).

The spelling of 21432301536 in words is "twenty-one billion, four hundred thirty-two million, three hundred one thousand, five hundred thirty-six".