20400334224 has 20 divisors (see below), whose sum is σ = 52700863536. Its totient is φ = 6800111392.

The previous prime is 20400334193. The next prime is 20400334259. The reversal of 20400334224 is 42243300402.

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 = 20400334194 and 20400334203.

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 3 ways as a sum of consecutive naturals, for example, 212503434 + ... + 212503529.

Almost surely, 2^20400334224 is an apocalyptic number.

20400334224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20400334224 is an abundant number, since it is smaller than the sum of its proper divisors (32300529312).

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

20400334224 is a wasteful number, since it uses less digits than its factorization.

20400334224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425006974 (or 425006968 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

Adding to 20400334224 its reverse (42243300402), we get a palindrome (62643634626).

The spelling of 20400334224 in words is "twenty billion, four hundred million, three hundred thirty-four thousand, two hundred twenty-four".