21892666280961 has 16 divisors (see below), whose sum is σ = 33614911807488. Its totient is φ = 12414598107600.

The previous prime is 21892666280869. The next prime is 21892666280981. The reversal of 21892666280961 is 16908266629812.

It is not a de Polignac number, because 21892666280961 - 2¹⁰ = 21892666279937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21892666280892 and 21892666280901.

It is not an unprimeable number, because it can be changed into a prime (21892666280981) 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, 3979035105 + ... + 3979040606.

It is an arithmetic number, because the mean of its divisors is an integer number (2100931987968).

Almost surely, 2^{21892666280961} is an apocalyptic number.

21892666280961 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21892666280961 is a deficient number, since it is larger than the sum of its proper divisors (11722245526527).

21892666280961 is a wasteful number, since it uses less digits than its factorization.

21892666280961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7958075852.

The product of its (nonzero) digits is 53747712, while the sum is 66.

The spelling of 21892666280961 in words is "twenty-one trillion, eight hundred ninety-two billion, six hundred sixty-six million, two hundred eighty thousand, nine hundred sixty-one".