20400254530 has 16 divisors (see below), whose sum is σ = 37185275520. Its totient is φ = 8056809072.

The previous prime is 20400254513. The next prime is 20400254531. The reversal of 20400254530 is 3545200402.

It is a junction number, because it is equal to n+sod(n) for n = 20400254495 and 20400254504.

It is not an unprimeable number, because it can be changed into a prime (20400254531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12910764 + ... + 12912343.

It is an arithmetic number, because the mean of its divisors is an integer number (2324079720).

Almost surely, 2^20400254530 is an apocalyptic number.

20400254530 is a deficient number, since it is larger than the sum of its proper divisors (16785020990).

20400254530 is a wasteful number, since it uses less digits than its factorization.

20400254530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25823193.

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20400254530 its reverse (3545200402), we get a palindrome (23945454932).

The spelling of 20400254530 in words is "twenty billion, four hundred million, two hundred fifty-four thousand, five hundred thirty".