20121523224 has 64 divisors (see below), whose sum is σ = 56360067840. Its totient is φ = 5932632960.

The previous prime is 20121523223. The next prime is 20121523229. The reversal of 20121523224 is 42232512102.

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 = 20121523194 and 20121523203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121523223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1020204 + ... + 1039739.

It is an arithmetic number, because the mean of its divisors is an integer number (880626060).

Almost surely, 2^20121523224 is an apocalyptic number.

20121523224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20121523224 is an abundant number, since it is smaller than the sum of its proper divisors (36238544616).

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

20121523224 is a wasteful number, since it uses less digits than its factorization.

20121523224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060000 (or 2059996 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

It can be divided in two parts, 20121 and 523224, that added together give a palindrome (543345).

The spelling of 20121523224 in words is "twenty billion, one hundred twenty-one million, five hundred twenty-three thousand, two hundred twenty-four".