220000020891 has 16 divisors (see below), whose sum is σ = 335295454464. Its totient is φ = 125692799904.

The previous prime is 220000020871. The next prime is 220000020943. The reversal of 220000020891 is 198020000022.

It is not a de Polignac number, because 220000020891 - 2¹³ = 220000012699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220000020811) 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, 769600 + ... + 1016013.

It is an arithmetic number, because the mean of its divisors is an integer number (20955965904).

Almost surely, 2^220000020891 is an apocalyptic number.

220000020891 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

220000020891 is a deficient number, since it is larger than the sum of its proper divisors (115295433573).

220000020891 is a wasteful number, since it uses less digits than its factorization.

220000020891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791490.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 220000020891 in words is "two hundred twenty billion, twenty thousand, eight hundred ninety-one".