20400003524 has 12 divisors (see below), whose sum is σ = 37578954000. Its totient is φ = 9663159528.

The previous prime is 20400003487. The next prime is 20400003527. The reversal of 20400003524 is 42530000402.

It is a junction number, because it is equal to n+sod(n) for n = 20400003496 and 20400003505.

It is not an unprimeable number, because it can be changed into a prime (20400003527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134210474 + ... + 134210625.

It is an arithmetic number, because the mean of its divisors is an integer number (3131579500).

Almost surely, 2^20400003524 is an apocalyptic number.

It is an amenable number.

20400003524 is a deficient number, since it is larger than the sum of its proper divisors (17178950476).

20400003524 is a wasteful number, since it uses less digits than its factorization.

20400003524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268421122 (or 268421120 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

Adding to 20400003524 its reverse (42530000402), we get a palindrome (62930003926).

The spelling of 20400003524 in words is "twenty billion, four hundred million, three thousand, five hundred twenty-four".