84220432989 has 32 divisors (see below), whose sum is σ = 148238263296. Its totient is φ = 41177291520.

The previous prime is 84220432943. The next prime is 84220432993. The reversal of 84220432989 is 98923402248.

It is not a de Polignac number, because 84220432989 - 2¹⁶ = 84220367453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84220432589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10719327 + ... + 10727180.

It is an arithmetic number, because the mean of its divisors is an integer number (4632445728).

Almost surely, 2^84220432989 is an apocalyptic number.

It is an amenable number.

84220432989 is a deficient number, since it is larger than the sum of its proper divisors (64017830307).

84220432989 is a wasteful number, since it uses less digits than its factorization.

84220432989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21446545.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 84220432989 in words is "eighty-four billion, two hundred twenty million, four hundred thirty-two thousand, nine hundred eighty-nine".