20210771736 has 48 divisors (see below), whose sum is σ = 54835887600. Its totient is φ = 6724815552.

The previous prime is 20210771689. The next prime is 20210771767. The reversal of 20210771736 is 63717701202.

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 20210771736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 211876 + ... + 292083.

It is an arithmetic number, because the mean of its divisors is an integer number (1142414325).

Almost surely, 2^20210771736 is an apocalyptic number.

It is an amenable number.

20210771736 is an abundant number, since it is smaller than the sum of its proper divisors (34625115864).

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

20210771736 is a wasteful number, since it uses less digits than its factorization.

20210771736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504528 (or 504521 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The spelling of 20210771736 in words is "twenty billion, two hundred ten million, seven hundred seventy-one thousand, seven hundred thirty-six".