21435463552 has 32 divisors (see below), whose sum is σ = 43010717400. Its totient is φ = 10640616960.

The previous prime is 21435463531. The next prime is 21435463559. The reversal of 21435463552 is 25536453412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21435463559) by changing a digit.

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, 584599 + ... + 620182.

Almost surely, 2^21435463552 is an apocalyptic number.

It is an amenable number.

21435463552 is an abundant number, since it is smaller than the sum of its proper divisors (21575253848).

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

21435463552 is a wasteful number, since it uses less digits than its factorization.

21435463552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204934 (or 1204922 counting only the distinct ones).

The product of its digits is 432000, while the sum is 40.

The spelling of 21435463552 in words is "twenty-one billion, four hundred thirty-five million, four hundred sixty-three thousand, five hundred fifty-two".