21946873442263 has 16 divisors (see below), whose sum is σ = 27747720737280. Its totient is φ = 16860594189600.

The previous prime is 21946873442233. The next prime is 21946873442267. The reversal of 21946873442263 is 36224437864912.

It is not a de Polignac number, because 21946873442263 - 2¹³ = 21946873434071 is a prime.

It is a super-3 number, since 3×21946873442263³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21946873442267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2007208128 + ... + 2007219061.

It is an arithmetic number, because the mean of its divisors is an integer number (1734232546080).

Almost surely, 2^{21946873442263} is an apocalyptic number.

21946873442263 is a deficient number, since it is larger than the sum of its proper divisors (5800847295017).

21946873442263 is a wasteful number, since it uses less digits than its factorization.

21946873442263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4014427278.

The product of its digits is 83607552, while the sum is 61.

The spelling of 21946873442263 in words is "twenty-one trillion, nine hundred forty-six billion, eight hundred seventy-three million, four hundred forty-two thousand, two hundred sixty-three".