24221320020 has 72 divisors (see below), whose sum is σ = 74675819400. Its totient is φ = 6353130240.

The previous prime is 24221320003. The next prime is 24221320021. The reversal of 24221320020 is 2002312242.

It can be written as a sum of positive squares in 4 ways, for example, as 1189008324 + 23032311696 = 34482^2 + 151764^2 .

It is a super-2 number, since 2×24221320020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 24221319975 and 24221320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24221320021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1091995 + ... + 1113954.

Almost surely, 2^24221320020 is an apocalyptic number.

24221320020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24221320020 is an abundant number, since it is smaller than the sum of its proper divisors (50454499380).

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

24221320020 is a wasteful number, since it uses less digits than its factorization.

24221320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206025 (or 2206020 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 24221320020 its reverse (2002312242), we get a palindrome (26223632262).

The spelling of 24221320020 in words is "twenty-four billion, two hundred twenty-one million, three hundred twenty thousand, twenty".