20400324411 has 16 divisors (see below), whose sum is σ = 29729507328. Its totient is φ = 12387292800.

The previous prime is 20400324401. The next prime is 20400324437. The reversal of 20400324411 is 11442300402.

It is not a de Polignac number, because 20400324411 - 2⁵ = 20400324379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20400324401) 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, 6450135 + ... + 6453296.

It is an arithmetic number, because the mean of its divisors is an integer number (1858094208).

Almost surely, 2^20400324411 is an apocalyptic number.

20400324411 is a deficient number, since it is larger than the sum of its proper divisors (9329182917).

20400324411 is a wasteful number, since it uses less digits than its factorization.

20400324411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12903482.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20400324411 its reverse (11442300402), we get a palindrome (31842624813).

The spelling of 20400324411 in words is "twenty billion, four hundred million, three hundred twenty-four thousand, four hundred eleven".