202630421 has 16 divisors (see below), whose sum is σ = 244867200. Its totient is φ = 163798848.

The previous prime is 202630411. The next prime is 202630423. The reversal of 202630421 is 124036202.

It is a de Polignac number, because none of the positive numbers 2^k-202630421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202630393 and 202630402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202630423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27131 + ... + 33783.

It is an arithmetic number, because the mean of its divisors is an integer number (15304200).

Almost surely, 2^202630421 is an apocalyptic number.

It is an amenable number.

202630421 is a deficient number, since it is larger than the sum of its proper divisors (42236779).

202630421 is a wasteful number, since it uses less digits than its factorization.

202630421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6908.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 202630421 is about 14234.8312599764. The cubic root of 202630421 is about 587.3561884909.

Adding to 202630421 its reverse (124036202), we get a palindrome (326666623).

The spelling of 202630421 in words is "two hundred two million, six hundred thirty thousand, four hundred twenty-one".