21961948883 has 4 divisors (see below), whose sum is σ = 25099370160. Its totient is φ = 18824527608.

The previous prime is 21961948873. The next prime is 21961948891. The reversal of 21961948883 is 38884916912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21961948883 - 2²⁰ = 21960900307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21961948873) 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, 1568710628 + ... + 1568710641.

It is an arithmetic number, because the mean of its divisors is an integer number (6274842540).

Almost surely, 2^21961948883 is an apocalyptic number.

21961948883 is a deficient number, since it is larger than the sum of its proper divisors (3137421277).

21961948883 is an equidigital number, since it uses as much as digits as its factorization.

21961948883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137421276.

The product of its digits is 5971968, while the sum is 59.

The spelling of 21961948883 in words is "twenty-one billion, nine hundred sixty-one million, nine hundred forty-eight thousand, eight hundred eighty-three".