21632326503261 has 8 divisors (see below), whose sum is σ = 28845046848384. Its totient is φ = 14420578580160.

The previous prime is 21632326503209. The next prime is 21632326503301. The reversal of 21632326503261 is 16230562323612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21632326503261 - 2⁶ = 21632326503197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632326503761) 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 7 ways as a sum of consecutive naturals, for example, 243053596 + ... + 243142581.

It is an arithmetic number, because the mean of its divisors is an integer number (3605630856048).

Almost surely, 2^{21632326503261} is an apocalyptic number.

It is an amenable number.

21632326503261 is a deficient number, since it is larger than the sum of its proper divisors (7212720345123).

21632326503261 is a wasteful number, since it uses less digits than its factorization.

21632326503261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486211011.

The product of its (nonzero) digits is 466560, while the sum is 42.

Adding to 21632326503261 its reverse (16230562323612), we get a palindrome (37862888826873).

The spelling of 21632326503261 in words is "twenty-one trillion, six hundred thirty-two billion, three hundred twenty-six million, five hundred three thousand, two hundred sixty-one".