20047743236 has 6 divisors (see below), whose sum is σ = 35083550670. Its totient is φ = 10023871616.

The previous prime is 20047743203. The next prime is 20047743259. The reversal of 20047743236 is 63234774002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13933441600 + 6114301636 = 118040^2 + 78194^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20047743236.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2505967901 + ... + 2505967908.

It is an arithmetic number, because the mean of its divisors is an integer number (5847258445).

Almost surely, 2^20047743236 is an apocalyptic number.

It is an amenable number.

20047743236 is a deficient number, since it is larger than the sum of its proper divisors (15035807434).

20047743236 is a wasteful number, since it uses less digits than its factorization.

20047743236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011935813 (or 5011935811 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 38.

The spelling of 20047743236 in words is "twenty billion, forty-seven million, seven hundred forty-three thousand, two hundred thirty-six".