20002440420 has 72 divisors (see below), whose sum is σ = 60700086720. Its totient is φ = 5331696960.

The previous prime is 20002440407. The next prime is 20002440473. The reversal of 20002440420 is 2404420002.

20002440420 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 244 + 0 + 420 = 666.

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 = 20002440393 and 20002440402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 420025 + ... + 465215.

It is an arithmetic number, because the mean of its divisors is an integer number (843056760).

Almost surely, 2^20002440420 is an apocalyptic number.

20002440420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002440420 is an abundant number, since it is smaller than the sum of its proper divisors (40697646300).

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

20002440420 is a wasteful number, since it uses less digits than its factorization.

20002440420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47665 (or 47660 counting only the distinct ones).

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

Adding to 20002440420 its reverse (2404420002), we get a palindrome (22406860422).

The spelling of 20002440420 in words is "twenty billion, two million, four hundred forty thousand, four hundred twenty".