20131333224 has 128 divisors (see below), whose sum is σ = 54344960640. Its totient is φ = 6191603712.

The previous prime is 20131333217. The next prime is 20131333267. The reversal of 20131333224 is 42233313102.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20131333194 and 20131333203.

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, 5150679 + ... + 5154585.

It is an arithmetic number, because the mean of its divisors is an integer number (424570005).

Almost surely, 2^20131333224 is an apocalyptic number.

20131333224 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 20131333224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27172480320).

20131333224 is an abundant number, since it is smaller than the sum of its proper divisors (34213627416).

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

20131333224 is a wasteful number, since it uses less digits than its factorization.

20131333224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179 (or 4175 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 20131333224 its reverse (42233313102), we get a palindrome (62364646326).

The spelling of 20131333224 in words is "twenty billion, one hundred thirty-one million, three hundred thirty-three thousand, two hundred twenty-four".