220022001989 has 4 divisors (see below), whose sum is σ = 221162012556. Its totient is φ = 218881991424.

The previous prime is 220022001967. The next prime is 220022002009. The reversal of 220022001989 is 989100220022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 148674249889 + 71347752100 = 385583^2 + 267110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220022001989 is a prime.

It is a super-2 number, since 2×220022001989² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220022081989) 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, 570004994 + ... + 570005379.

It is an arithmetic number, because the mean of its divisors is an integer number (55290503139).

Almost surely, 2^220022001989 is an apocalyptic number.

It is an amenable number.

220022001989 is a deficient number, since it is larger than the sum of its proper divisors (1140010567).

220022001989 is a wasteful number, since it uses less digits than its factorization.

220022001989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140010566.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 220022001989 in words is "two hundred twenty billion, twenty-two million, one thousand, nine hundred eighty-nine".