21325211448 has 32 divisors (see below), whose sum is σ = 53325941760. Its totient is φ = 7106682080.

The previous prime is 21325211443. The next prime is 21325211449. The reversal of 21325211448 is 84411252312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21325211443) 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 7 ways as a sum of consecutive naturals, for example, 4440 + ... + 206567.

It is an arithmetic number, because the mean of its divisors is an integer number (1666435680).

Almost surely, 2^21325211448 is an apocalyptic number.

It is an amenable number.

21325211448 is an abundant number, since it is smaller than the sum of its proper divisors (32000730312).

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

21325211448 is a wasteful number, since it uses less digits than its factorization.

21325211448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215227 (or 215223 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The spelling of 21325211448 in words is "twenty-one billion, three hundred twenty-five million, two hundred eleven thousand, four hundred forty-eight".