83609421021 has 32 divisors (see below), whose sum is σ = 141598407680. Its totient is φ = 47764161648.

The previous prime is 83609421001. The next prime is 83609421073. The reversal of 83609421021 is 12012490638.

83609421021 is a `hidden beast` number, since 8 + 3 + 609 + 4 + 21 + 0 + 21 = 666.

It is not a de Polignac number, because 83609421021 - 2⁵ = 83609420989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83609421001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681810 + ... + 795036.

It is an arithmetic number, because the mean of its divisors is an integer number (4424950240).

Almost surely, 2^83609421021 is an apocalyptic number.

It is an amenable number.

83609421021 is a deficient number, since it is larger than the sum of its proper divisors (57988986659).

83609421021 is a wasteful number, since it uses less digits than its factorization.

83609421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117150 (or 117144 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 83609421021 in words is "eighty-three billion, six hundred nine million, four hundred twenty-one thousand, twenty-one".