20400424402 has 16 divisors (see below), whose sum is σ = 31945534272. Its totient is φ = 9752314000.

The previous prime is 20400424381. The next prime is 20400424403. The reversal of 20400424402 is 20442400402.

It is not an unprimeable number, because it can be changed into a prime (20400424403) 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, 3777 + ... + 202027.

It is an arithmetic number, because the mean of its divisors is an integer number (1996595892).

Almost surely, 2^20400424402 is an apocalyptic number.

20400424402 is a deficient number, since it is larger than the sum of its proper divisors (11545109870).

20400424402 is a wasteful number, since it uses less digits than its factorization.

20400424402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200513.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20400424402 its reverse (20442400402), we get a palindrome (40842824804).

The spelling of 20400424402 in words is "twenty billion, four hundred million, four hundred twenty-four thousand, four hundred two".