21942566681262 has 8 divisors (see below), whose sum is σ = 43885133362536. Its totient is φ = 7314188893752.

The previous prime is 21942566681251. The next prime is 21942566681263. The reversal of 21942566681262 is 26218666524912.

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

21942566681262 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21942566681196 and 21942566681205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21942566681263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1828547223433 + ... + 1828547223444.

It is an arithmetic number, because the mean of its divisors is an integer number (5485641670317).

Almost surely, 2^{21942566681262} is an apocalyptic number.

21942566681262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21942566681262 is a wasteful number, since it uses less digits than its factorization.

21942566681262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657094446882.

The product of its digits is 29859840, while the sum is 60.

The spelling of 21942566681262 in words is "twenty-one trillion, nine hundred forty-two billion, five hundred sixty-six million, six hundred eighty-one thousand, two hundred sixty-two".