21622012251643 has 8 divisors (see below), whose sum is σ = 22369611232080. Its totient is φ = 20874547428000.

The previous prime is 21622012251641. The next prime is 21622012251661. The reversal of 21622012251643 is 34615221022612.

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 21622012251643 - 2¹ = 21622012251641 is a prime.

It is a super-2 number, since 2×21622012251643² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21622012251641) 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, 33211233 + ... + 33856018.

It is an arithmetic number, because the mean of its divisors is an integer number (2796201404010).

Almost surely, 2^{21622012251643} is an apocalyptic number.

21622012251643 is a deficient number, since it is larger than the sum of its proper divisors (747598980437).

21622012251643 is a wasteful number, since it uses less digits than its factorization.

21622012251643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67078397.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 21622012251643 in words is "twenty-one trillion, six hundred twenty-two billion, twelve million, two hundred fifty-one thousand, six hundred forty-three".