20036287656 has 320 divisors, whose sum is σ = 71865636480. Its totient is φ = 5063109120.

The previous prime is 20036287637. The next prime is 20036287657. The reversal of 20036287656 is 65678263002.

It is a happy number.

20036287656 is a `hidden beast` number, since 200 + 362 + 87 + 6 + 5 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (20036287657) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1840726 + ... + 1851578.

It is an arithmetic number, because the mean of its divisors is an integer number (224580114).

Almost surely, 2^20036287656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20036287656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35932818240).

20036287656 is an abundant number, since it is smaller than the sum of its proper divisors (51829348824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20036287656 is a wasteful number, since it uses less digits than its factorization.

20036287656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10926 (or 10913 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 20036287656 in words is "twenty billion, thirty-six million, two hundred eighty-seven thousand, six hundred fifty-six".