21004241532 has 48 divisors (see below), whose sum is σ = 50997123072. Its totient is φ = 6723146560.

The previous prime is 21004241521. The next prime is 21004241537. The reversal of 21004241532 is 23514240012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004241537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321444 + ... + 381227.

It is an arithmetic number, because the mean of its divisors is an integer number (1062440064).

Almost surely, 2^21004241532 is an apocalyptic number.

It is an amenable number.

21004241532 is an abundant number, since it is smaller than the sum of its proper divisors (29992881540).

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

21004241532 is a wasteful number, since it uses less digits than its factorization.

21004241532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702778 (or 702776 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21004241532 its reverse (23514240012), we get a palindrome (44518481544).

The spelling of 21004241532 in words is "twenty-one billion, four million, two hundred forty-one thousand, five hundred thirty-two".