20422040424 has 16 divisors (see below), whose sum is σ = 51055101120. Its totient is φ = 6807346800.

The previous prime is 20422040413. The next prime is 20422040447. The reversal of 20422040424 is 42404022402.

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: 850918351 = 20422040424 / (2 + 0 + 4 + 2 + 2 + 0 + 4 + 0 + 4 + 2 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 20422040394 and 20422040403.

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, 425459152 + ... + 425459199.

It is an arithmetic number, because the mean of its divisors is an integer number (3190943820).

Almost surely, 2^20422040424 is an apocalyptic number.

20422040424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20422040424 is an abundant number, since it is smaller than the sum of its proper divisors (30633060696).

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

20422040424 is a wasteful number, since it uses less digits than its factorization.

20422040424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850918360 (or 850918356 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20422040424 its reverse (42404022402), we get a palindrome (62826062826).

The spelling of 20422040424 in words is "twenty billion, four hundred twenty-two million, forty thousand, four hundred twenty-four".