20400201434 has 32 divisors (see below), whose sum is σ = 32286988800. Its totient is φ = 9654160320.

The previous prime is 20400201401. The next prime is 20400201439. The reversal of 20400201434 is 43410200402.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20400201439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706472 + ... + 734780.

It is an arithmetic number, because the mean of its divisors is an integer number (1008968400).

Almost surely, 2^20400201434 is an apocalyptic number.

20400201434 is a deficient number, since it is larger than the sum of its proper divisors (11886787366).

20400201434 is a wasteful number, since it uses less digits than its factorization.

20400201434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28598.

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20400201434 its reverse (43410200402), we get a palindrome (63810401836).

The spelling of 20400201434 in words is "twenty billion, four hundred million, two hundred one thousand, four hundred thirty-four".