21233401144 has 32 divisors (see below), whose sum is σ = 41109552000. Its totient is φ = 10271064960.

The previous prime is 21233401139. The next prime is 21233401169. The reversal of 21233401144 is 44110433212.

It is a super-3 number, since 3×21233401144³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 930382 + ... + 952930.

It is an arithmetic number, because the mean of its divisors is an integer number (1284673500).

Almost surely, 2^21233401144 is an apocalyptic number.

It is an amenable number.

21233401144 is a deficient number, since it is larger than the sum of its proper divisors (19876150856).

21233401144 is a wasteful number, since it uses less digits than its factorization.

21233401144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26383 (or 26379 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21233401144 its reverse (44110433212), we get a palindrome (65343834356).

The spelling of 21233401144 in words is "twenty-one billion, two hundred thirty-three million, four hundred one thousand, one hundred forty-four".