202120418 has 8 divisors (see below), whose sum is σ = 311374812. Its totient is φ = 98328816.

The previous prime is 202120417. The next prime is 202120421. The reversal of 202120418 is 814021202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 194128489 + 7991929 = 13933^2 + 2827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 202120418.

It is not an unprimeable number, because it can be changed into a prime (202120411) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1365605 + ... + 1365752.

Almost surely, 2^202120418 is an apocalyptic number.

202120418 is a deficient number, since it is larger than the sum of its proper divisors (109254394).

202120418 is a wasteful number, since it uses less digits than its factorization.

202120418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731396.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 202120418 is about 14216.9060628535. The cubic root of 202120418 is about 586.8629998155.

The spelling of 202120418 in words is "two hundred two million, one hundred twenty thousand, four hundred eighteen".