20201965056 has 800 divisors, whose sum is σ = 76361237568. Its totient is φ = 5175705600.

The previous prime is 20201965039. The next prime is 20201965073. The reversal of 20201965056 is 65056910202.

It is an interprime number because it is at equal distance from previous prime (20201965039) and next prime (20201965073).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20201965056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 200019406 + ... + 200019506.

Almost surely, 2^20201965056 is an apocalyptic number.

20201965056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201965056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38180618784).

20201965056 is an abundant number, since it is smaller than the sum of its proper divisors (56159272512).

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

20201965056 is a wasteful number, since it uses less digits than its factorization.

20201965056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 20201965056 in words is "twenty billion, two hundred one million, nine hundred sixty-five thousand, fifty-six".