20400440094 has 12 divisors (see below), whose sum is σ = 44200953576. Its totient is φ = 6800146692.

The previous prime is 20400440057. The next prime is 20400440119. The reversal of 20400440094 is 49004400402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566678874 + ... + 566678909.

It is an arithmetic number, because the mean of its divisors is an integer number (3683412798).

Almost surely, 2^20400440094 is an apocalyptic number.

20400440094 is an abundant number, since it is smaller than the sum of its proper divisors (23800513482).

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

20400440094 is a wasteful number, since it uses less digits than its factorization.

20400440094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133357791 (or 1133357788 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20400440094 its reverse (49004400402), we get a palindrome (69404840496).

The spelling of 20400440094 in words is "twenty billion, four hundred million, four hundred forty thousand, ninety-four".