20899621729373 has 8 divisors (see below), whose sum is σ = 21105676265856. Its totient is φ = 20694457278000.

The previous prime is 20899621729351. The next prime is 20899621729423. The reversal of 20899621729373 is 37392712699802.

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

It is a cyclic number.

It is not a de Polignac number, because 20899621729373 - 2¹² = 20899621725277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20899621729333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222474086 + ... + 222568007.

It is an arithmetic number, because the mean of its divisors is an integer number (2638209533232).

Almost surely, 2^{20899621729373} is an apocalyptic number.

It is an amenable number.

20899621729373 is a deficient number, since it is larger than the sum of its proper divisors (206054536483).

20899621729373 is a wasteful number, since it uses less digits than its factorization.

20899621729373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445042555.

The product of its (nonzero) digits is 123451776, while the sum is 68.

The spelling of 20899621729373 in words is "twenty trillion, eight hundred ninety-nine billion, six hundred twenty-one million, seven hundred twenty-nine thousand, three hundred seventy-three".