202128018490 has 32 divisors (see below), whose sum is σ = 364890744000. Its totient is φ = 80615703168.

The previous prime is 202128018487. The next prime is 202128018539. The reversal of 202128018490 is 94810821202.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25233606 + ... + 25241614.

It is an arithmetic number, because the mean of its divisors is an integer number (11402835750).

Almost surely, 2^202128018490 is an apocalyptic number.

202128018490 is a deficient number, since it is larger than the sum of its proper divisors (162762725510).

202128018490 is a wasteful number, since it uses less digits than its factorization.

202128018490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15054.

The product of its (nonzero) digits is 18432, while the sum is 37.

Adding to 202128018490 its reverse (94810821202), we get a palindrome (296938839692).

The spelling of 202128018490 in words is "two hundred two billion, one hundred twenty-eight million, eighteen thousand, four hundred ninety".