201449665020 has 24 divisors (see below), whose sum is σ = 564059062224. Its totient is φ = 53719910656.

The previous prime is 201449665013. The next prime is 201449665037. The reversal of 201449665020 is 20566944102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201449665020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1678747149 + ... + 1678747268.

It is an arithmetic number, because the mean of its divisors is an integer number (23502460926).

Almost surely, 2^201449665020 is an apocalyptic number.

201449665020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201449665020 is an abundant number, since it is smaller than the sum of its proper divisors (362609397204).

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

201449665020 is a wasteful number, since it uses less digits than its factorization.

201449665020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3357494429 (or 3357494427 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 201449665020 in words is "two hundred one billion, four hundred forty-nine million, six hundred sixty-five thousand, twenty".