20002220424 has 48 divisors (see below), whose sum is σ = 55636814220. Its totient is φ = 6487205760.

The previous prime is 20002220423. The next prime is 20002220437. The reversal of 20002220424 is 42402220002.

20002220424 is a `hidden beast` number, since 20 + 0 + 0 + 2 + 220 + 424 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19720584900 + 281635524 = 140430^2 + 16782^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20002220397 and 20002220406.

It is not an unprimeable number, because it can be changed into a prime (20002220423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3751507 + ... + 3756834.

Almost surely, 2^20002220424 is an apocalyptic number.

20002220424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20002220424 is an abundant number, since it is smaller than the sum of its proper divisors (35634593796).

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

20002220424 is a wasteful number, since it uses less digits than its factorization.

20002220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7508390 (or 7508383 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20002220424 its reverse (42402220002), we get a palindrome (62404440426).

The spelling of 20002220424 in words is "twenty billion, two million, two hundred twenty thousand, four hundred twenty-four".