20040240430 has 32 divisors (see below), whose sum is σ = 41231586816. Its totient is φ = 6869948064.

The previous prime is 20040240419. The next prime is 20040240431. The reversal of 20040240430 is 3404204002.

It is a super-2 number, since 2×20040240430² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20040240398 and 20040240407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040240431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600237 + ... + 632743.

It is an arithmetic number, because the mean of its divisors is an integer number (1288487088).

Almost surely, 2^20040240430 is an apocalyptic number.

20040240430 is an abundant number, since it is smaller than the sum of its proper divisors (21191346386).

20040240430 is a wasteful number, since it uses less digits than its factorization.

20040240430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41328.

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20040240430 its reverse (3404204002), we get a palindrome (23444444432).

The spelling of 20040240430 in words is "twenty billion, forty million, two hundred forty thousand, four hundred thirty".