20599374646 has 4 divisors (see below), whose sum is σ = 30899061972. Its totient is φ = 10299687322.

The previous prime is 20599374643. The next prime is 20599374659. The reversal of 20599374646 is 64647399502.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20599374641) by changing a digit.

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 as a sum of consecutive naturals, namely, 5149843660 + ... + 5149843663.

It is an arithmetic number, because the mean of its divisors is an integer number (7724765493).

Almost surely, 2^20599374646 is an apocalyptic number.

20599374646 is a deficient number, since it is larger than the sum of its proper divisors (10299687326).

20599374646 is a wasteful number, since it uses less digits than its factorization.

20599374646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10299687325.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 20599374646 in words is "twenty billion, five hundred ninety-nine million, three hundred seventy-four thousand, six hundred forty-six".