20356771996 has 24 divisors (see below), whose sum is σ = 39060218736. Its totient is φ = 9206104320.

The previous prime is 20356771987. The next prime is 20356771997. The reversal of 20356771996 is 69917765302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20356771997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165581 + ... + 1182916.

It is an arithmetic number, because the mean of its divisors is an integer number (1627509114).

Almost surely, 2^20356771996 is an apocalyptic number.

It is an amenable number.

20356771996 is a deficient number, since it is larger than the sum of its proper divisors (18703446740).

20356771996 is a wasteful number, since it uses less digits than its factorization.

20356771996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348709 (or 2348707 counting only the distinct ones).

The product of its (nonzero) digits is 4286520, while the sum is 55.

The spelling of 20356771996 in words is "twenty billion, three hundred fifty-six million, seven hundred seventy-one thousand, nine hundred ninety-six".