21233002455504 has 240 divisors, whose sum is σ = 70742997491712. Its totient is φ = 6039366044544.

The previous prime is 21233002455443. The next prime is 21233002455521. The reversal of 21233002455504 is 40555420033212.

21233002455504 is a `hidden beast` number, since 2 + 123 + 3 + 0 + 0 + 24 + 5 + 5 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4319917 + ... + 7818419.

Almost surely, 2^{21233002455504} is an apocalyptic number.

21233002455504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21233002455504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35371498745856).

21233002455504 is an abundant number, since it is smaller than the sum of its proper divisors (49509995036208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21233002455504 is a wasteful number, since it uses less digits than its factorization.

21233002455504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498756 (or 3498738 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 21233002455504 its reverse (40555420033212), we get a palindrome (61788422488716).

The spelling of 21233002455504 in words is "twenty-one trillion, two hundred thirty-three billion, two million, four hundred fifty-five thousand, five hundred four".