21023331323220 has 96 divisors (see below), whose sum is σ = 66639993719040. Its totient is φ = 5500443911040.

The previous prime is 21023331323147. The next prime is 21023331323287. The reversal of 21023331323220 is 2232313332012.

21023331323220 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 3 + 331 + 3 + 2 + 322 + 0 = 666.

It is a super-2 number, since 2×21023331323220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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, 367255296 + ... + 367312535.

It is an arithmetic number, because the mean of its divisors is an integer number (694166601240).

Almost surely, 2^{21023331323220} is an apocalyptic number.

21023331323220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023331323220 is an abundant number, since it is smaller than the sum of its proper divisors (45616662395820).

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

21023331323220 is a wasteful number, since it uses less digits than its factorization.

21023331323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734567902 (or 734567894 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 27.

Adding to 21023331323220 its reverse (2232313332012), we get a palindrome (23255644655232).

The spelling of 21023331323220 in words is "twenty-one trillion, twenty-three billion, three hundred thirty-one million, three hundred twenty-three thousand, two hundred twenty".