22112020987 has 4 divisors (see below), whose sum is σ = 25270881136. Its totient is φ = 18953160840.

The previous prime is 22112020961. The next prime is 22112020999. The reversal of 22112020987 is 78902021122.

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 22112020987 - 2¹⁹ = 22111496699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22112020087) 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, 1579430064 + ... + 1579430077.

It is an arithmetic number, because the mean of its divisors is an integer number (6317720284).

Almost surely, 2^22112020987 is an apocalyptic number.

22112020987 is a deficient number, since it is larger than the sum of its proper divisors (3158860149).

22112020987 is an equidigital number, since it uses as much as digits as its factorization.

22112020987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3158860148.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 22112020987 in words is "twenty-two billion, one hundred twelve million, twenty thousand, nine hundred eighty-seven".