21622736273437 has 8 divisors (see below), whose sum is σ = 23286305385504. Its totient is φ = 19959207405168.

The previous prime is 21622736273419. The next prime is 21622736273441. The reversal of 21622736273437 is 73437263722612.

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 21622736273437 - 2³⁹ = 21072980459549 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 (21622736273417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8940403 + ... + 11098480.

It is an arithmetic number, because the mean of its divisors is an integer number (2910788173188).

Almost surely, 2^{21622736273437} is an apocalyptic number.

It is an amenable number.

21622736273437 is a deficient number, since it is larger than the sum of its proper divisors (1663569112067).

21622736273437 is a wasteful number, since it uses less digits than its factorization.

21622736273437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20121899.

The product of its digits is 21337344, while the sum is 55.

The spelling of 21622736273437 in words is "twenty-one trillion, six hundred twenty-two billion, seven hundred thirty-six million, two hundred seventy-three thousand, four hundred thirty-seven".