201890201868 has 48 divisors (see below), whose sum is σ = 529881028320. Its totient is φ = 67296731040.

The previous prime is 201890201861. The next prime is 201890201899. The reversal of 201890201868 is 868102098102.

It is a happy number.

It is a super-2 number, since 2×201890201868² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201890201861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11530473 + ... + 11547968.

It is an arithmetic number, because the mean of its divisors is an integer number (11039188090).

Almost surely, 2^201890201868 is an apocalyptic number.

It is an amenable number.

201890201868 is an abundant number, since it is smaller than the sum of its proper divisors (327990826452).

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

201890201868 is an equidigital number, since it uses as much as digits as its factorization.

201890201868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23078466 (or 23078446 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 201890201868 in words is "two hundred one billion, eight hundred ninety million, two hundred one thousand, eight hundred sixty-eight".