20036287636 has 12 divisors (see below), whose sum is σ = 35113527540. Its totient is φ = 10003851200.

The previous prime is 20036287633. The next prime is 20036287637. The reversal of 20036287636 is 63678263002.

It can be written as a sum of positive squares in 2 ways, for example, as 9582452100 + 10453835536 = 97890^2 + 102244^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20036287592 and 20036287601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20036287631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3570001 + ... + 3575608.

It is an arithmetic number, because the mean of its divisors is an integer number (2926127295).

Almost surely, 2^20036287636 is an apocalyptic number.

It is an amenable number.

20036287636 is a deficient number, since it is larger than the sum of its proper divisors (15077239904).

20036287636 is a wasteful number, since it uses less digits than its factorization.

20036287636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7146314 (or 7146312 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 43.

The spelling of 20036287636 in words is "twenty billion, thirty-six million, two hundred eighty-seven thousand, six hundred thirty-six".