20464222642619 has 24 divisors (see below), whose sum is σ = 24889775961600. Its totient is φ = 16478770928256.

The previous prime is 20464222642559. The next prime is 20464222642621. The reversal of 20464222642619 is 91624622246402.

It is not a de Polignac number, because 20464222642619 - 2¹⁶ = 20464222577083 is a prime.

It is a super-2 number, since 2×20464222642619² (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 (20464222602619) 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 23 ways as a sum of consecutive naturals, for example, 8140019 + ... + 10353180.

It is an arithmetic number, because the mean of its divisors is an integer number (1037073998400).

Almost surely, 2^{20464222642619} is an apocalyptic number.

20464222642619 is a deficient number, since it is larger than the sum of its proper divisors (4425553318981).

20464222642619 is a wasteful number, since it uses less digits than its factorization.

20464222642619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493787 (or 18493770 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 50.

The spelling of 20464222642619 in words is "twenty trillion, four hundred sixty-four billion, two hundred twenty-two million, six hundred forty-two thousand, six hundred nineteen".