21532245501 has 64 divisors (see below), whose sum is σ = 34684231680. Its totient is φ = 11751505920.

The previous prime is 21532245461. The next prime is 21532245503. The reversal of 21532245501 is 10554223512.

It is not a de Polignac number, because 21532245501 - 2²¹ = 21530148349 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21532245503) 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 63 ways as a sum of consecutive naturals, for example, 787581 + ... + 814461.

It is an arithmetic number, because the mean of its divisors is an integer number (541941120).

Almost surely, 2^21532245501 is an apocalyptic number.

It is an amenable number.

21532245501 is a deficient number, since it is larger than the sum of its proper divisors (13151986179).

21532245501 is a wasteful number, since it uses less digits than its factorization.

21532245501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26986.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21532245501 in words is "twenty-one billion, five hundred thirty-two million, two hundred forty-five thousand, five hundred one".