20112451224 has 16 divisors (see below), whose sum is σ = 50281128120. Its totient is φ = 6704150400.

The previous prime is 20112451153. The next prime is 20112451243. The reversal of 20112451224 is 42215421102.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 838018801 = 20112451224 / (2 + 0 + 1 + 1 + 2 + 4 + 5 + 1 + 2 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 20112451194 and 20112451203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419009377 + ... + 419009424.

Almost surely, 2^20112451224 is an apocalyptic number.

20112451224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20112451224 is an abundant number, since it is smaller than the sum of its proper divisors (30168676896).

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

20112451224 is a wasteful number, since it uses less digits than its factorization.

20112451224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838018810 (or 838018806 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 20112451224 its reverse (42215421102), we get a palindrome (62327872326).

The spelling of 20112451224 in words is "twenty billion, one hundred twelve million, four hundred fifty-one thousand, two hundred twenty-four".