21632044354061 has 4 divisors (see below), whose sum is σ = 21834212992992. Its totient is φ = 21429875715132.

The previous prime is 21632044354051. The next prime is 21632044354163. The reversal of 21632044354061 is 16045344023612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21632044354061 - 2³⁴ = 21614864484877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21632044354051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101084319305 + ... + 101084319518.

It is an arithmetic number, because the mean of its divisors is an integer number (5458553248248).

Almost surely, 2^{21632044354061} is an apocalyptic number.

It is an amenable number.

21632044354061 is a deficient number, since it is larger than the sum of its proper divisors (202168638931).

21632044354061 is a wasteful number, since it uses less digits than its factorization.

21632044354061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202168638930.

The product of its (nonzero) digits is 414720, while the sum is 41.

Adding to 21632044354061 its reverse (16045344023612), we get a palindrome (37677388377673).

The spelling of 21632044354061 in words is "twenty-one trillion, six hundred thirty-two billion, forty-four million, three hundred fifty-four thousand, sixty-one".