202421034204420 has 24 divisors (see below), whose sum is σ = 566778895772544. Its totient is φ = 53978942454496.

The previous prime is 202421034204407. The next prime is 202421034204427. The reversal of 202421034204420 is 24402430124202.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (202421034204427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1686841951644 + ... + 1686841951763.

It is an arithmetic number, because the mean of its divisors is an integer number (23615787323856).

Almost surely, 2^{202421034204420} is an apocalyptic number.

202421034204420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202421034204420 is an abundant number, since it is smaller than the sum of its proper divisors (364357861568124).

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

202421034204420 is a wasteful number, since it uses less digits than its factorization.

202421034204420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373683903419 (or 3373683903417 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 202421034204420 its reverse (24402430124202), we get a palindrome (226823464328622).

The spelling of 202421034204420 in words is "two hundred two trillion, four hundred twenty-one billion, thirty-four million, two hundred four thousand, four hundred twenty".