20638324852 has 12 divisors (see below), whose sum is σ = 36153817056. Its totient is φ = 10308662840.

The previous prime is 20638324813. The next prime is 20638324873. The reversal of 20638324852 is 25842383602.

It is a junction number, because it is equal to n+sod(n) for n = 20638324799 and 20638324808.

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 3 ways as a sum of consecutive naturals, for example, 2620474 + ... + 2628337.

It is an arithmetic number, because the mean of its divisors is an integer number (3012818088).

Almost surely, 2^20638324852 is an apocalyptic number.

It is an amenable number.

20638324852 is a deficient number, since it is larger than the sum of its proper divisors (15515492204).

20638324852 is a wasteful number, since it uses less digits than its factorization.

20638324852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249798 (or 5249796 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 20638324852 in words is "twenty billion, six hundred thirty-eight million, three hundred twenty-four thousand, eight hundred fifty-two".