20958755785902 has 72 divisors (see below), whose sum is σ = 52624343862792. Its totient is φ = 5977541740800.

The previous prime is 20958755785897. The next prime is 20958755785927.

It is a happy number.

20958755785902 is a `hidden beast` number, since 20 + 9 + 5 + 8 + 7 + 5 + 5 + 7 + 8 + 590 + 2 = 666.

20958755785902 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 183078249 + ... + 183192692.

It is an arithmetic number, because the mean of its divisors is an integer number (730893664761).

Almost surely, 2^{20958755785902} is an apocalyptic number.

20958755785902 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20958755785902 is an abundant number, since it is smaller than the sum of its proper divisors (31665588076890).

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

20958755785902 is a wasteful number, since it uses less digits than its factorization.

20958755785902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366270994 (or 366270974 counting only the distinct ones).

The product of its (nonzero) digits is 635040000, while the sum is 72.

The spelling of 20958755785902 in words is "twenty trillion, nine hundred fifty-eight billion, seven hundred fifty-five million, seven hundred eighty-five thousand, nine hundred two".