21010233404 has 12 divisors (see below), whose sum is σ = 36769932024. Its totient is φ = 10504538544.

The previous prime is 21010233401. The next prime is 21010233449. The reversal of 21010233404 is 40433201012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010233401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56867 + ... + 212730.

It is an arithmetic number, because the mean of its divisors is an integer number (3064161002).

Almost surely, 2^21010233404 is an apocalyptic number.

It is an amenable number.

21010233404 is a deficient number, since it is larger than the sum of its proper divisors (15759698620).

21010233404 is a wasteful number, since it uses less digits than its factorization.

21010233404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289084 (or 289082 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21010233404 its reverse (40433201012), we get a palindrome (61443434416).

The spelling of 21010233404 in words is "twenty-one billion, ten million, two hundred thirty-three thousand, four hundred four".