20400323570 has 64 divisors (see below), whose sum is σ = 42032390400. Its totient is φ = 7056403200.

The previous prime is 20400323569. The next prime is 20400323599. The reversal of 20400323570 is 7532300402.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 435656 + ... + 480204.

It is an arithmetic number, because the mean of its divisors is an integer number (656756100).

Almost surely, 2^20400323570 is an apocalyptic number.

20400323570 is an abundant number, since it is smaller than the sum of its proper divisors (21632066830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20400323570 is a wasteful number, since it uses less digits than its factorization.

20400323570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44771.

The product of its (nonzero) digits is 5040, while the sum is 26.

Adding to 20400323570 its reverse (7532300402), we get a palindrome (27932623972).

The spelling of 20400323570 in words is "twenty billion, four hundred million, three hundred twenty-three thousand, five hundred seventy".