202100004 has 18 divisors (see below), whose sum is σ = 510863990. Its totient is φ = 67366656.

The previous prime is 202099993. The next prime is 202100033. The reversal of 202100004 is 400001202.

It can be written as a sum of positive squares in only one way, i.e., 164865600 + 37234404 = 12840^2 + 6102^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2806909 + ... + 2806980.

Almost surely, 2^202100004 is an apocalyptic number.

It is an amenable number.

202100004 is an abundant number, since it is smaller than the sum of its proper divisors (308763986).

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

202100004 is a wasteful number, since it uses less digits than its factorization.

202100004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5613899 (or 5613894 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 202100004 is about 14216.1880966735. The cubic root of 202100004 is about 586.8432415863.

Adding to 202100004 its reverse (400001202), we get a palindrome (602101206).

The spelling of 202100004 in words is "two hundred two million, one hundred thousand, four".