21032133544 has 16 divisors (see below), whose sum is σ = 39449193300. Its totient is φ = 10512348672.

The previous prime is 21032133527. The next prime is 21032133553. The reversal of 21032133544 is 44533123012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15697584100 + 5334549444 = 125290^2 + 73038^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440649 + ... + 486040.

Almost surely, 2^21032133544 is an apocalyptic number.

It is an amenable number.

21032133544 is a deficient number, since it is larger than the sum of its proper divisors (18417059756).

21032133544 is a wasteful number, since it uses less digits than its factorization.

21032133544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929532 (or 929528 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 21032133544 its reverse (44533123012), we get a palindrome (65565256556).

The spelling of 21032133544 in words is "twenty-one billion, thirty-two million, one hundred thirty-three thousand, five hundred forty-four".