20420204424 has 64 divisors (see below), whose sum is σ = 51795858240. Its totient is φ = 6708019200.

The previous prime is 20420204393. The next prime is 20420204473. The reversal of 20420204424 is 42440202402.

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 = 20420204394 and 20420204403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475024 + ... + 516224.

It is an arithmetic number, because the mean of its divisors is an integer number (809310285).

Almost surely, 2^20420204424 is an apocalyptic number.

20420204424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20420204424 is an abundant number, since it is smaller than the sum of its proper divisors (31375653816).

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

20420204424 is a wasteful number, since it uses less digits than its factorization.

20420204424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41510 (or 41506 counting only the distinct ones).

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

Adding to 20420204424 its reverse (42440202402), we get a palindrome (62860406826).

The spelling of 20420204424 in words is "twenty billion, four hundred twenty million, two hundred four thousand, four hundred twenty-four".