202118490 has 160 divisors (see below), whose sum is σ = 636324480. Its totient is φ = 45069696.

The previous prime is 202118489. The next prime is 202118513. The reversal of 202118490 is 94811202.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 243396 + ... + 244224.

It is an arithmetic number, because the mean of its divisors is an integer number (3977028).

Almost surely, 2^202118490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202118490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318162240).

202118490 is an abundant number, since it is smaller than the sum of its proper divisors (434205990).

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

202118490 is a wasteful number, since it uses less digits than its factorization.

202118490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 202118490 is about 14216.8382560962. The cubic root of 202118490 is about 586.8611338067.

Adding to 202118490 its reverse (94811202), we get a palindrome (296929692).

The spelling of 202118490 in words is "two hundred two million, one hundred eighteen thousand, four hundred ninety".