20326400694 has 24 divisors (see below), whose sum is σ = 44786986920. Its totient is φ = 6660628128.

The previous prime is 20326400657. The next prime is 20326400707. The reversal of 20326400694 is 49600462302.

20326400694 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 640 + 0 + 6 + 9 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9568807 + ... + 9570930.

It is an arithmetic number, because the mean of its divisors is an integer number (1866124455).

Almost surely, 2^20326400694 is an apocalyptic number.

20326400694 is an abundant number, since it is smaller than the sum of its proper divisors (24460586226).

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

20326400694 is a wasteful number, since it uses less digits than its factorization.

20326400694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19139804 (or 19139801 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 20326400694 its reverse (49600462302), we get a palindrome (69926862996).

The spelling of 20326400694 in words is "twenty billion, three hundred twenty-six million, four hundred thousand, six hundred ninety-four".