20202887065664 has 14 divisors (see below), whose sum is σ = 40090104021054. Its totient is φ = 10101443532800.

The previous prime is 20202887065651. The next prime is 20202887065679. The reversal of 20202887065664 is 46656078820202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19937653825600 + 265233240064 = 4465160^2 + 515008^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157835055137 + ... + 157835055264.

Almost surely, 2^{20202887065664} is an apocalyptic number.

It is an amenable number.

20202887065664 is a deficient number, since it is larger than the sum of its proper divisors (19887216955390).

20202887065664 is an equidigital number, since it uses as much as digits as its factorization.

20202887065664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315670110413 (or 315670110403 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 56.

The spelling of 20202887065664 in words is "twenty trillion, two hundred two billion, eight hundred eighty-seven million, sixty-five thousand, six hundred sixty-four".