203421020 has 24 divisors (see below), whose sum is σ = 466019568. Its totient is φ = 73971200.

The previous prime is 203421019. The next prime is 203421059. The reversal of 203421020 is 20124302.

It is a super-2 number, since 2×203421020² = 82760222755680800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203420986 and 203421004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 462101 + ... + 462540.

It is an arithmetic number, because the mean of its divisors is an integer number (19417482).

Almost surely, 2^203421020 is an apocalyptic number.

203421020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203421020 is an abundant number, since it is smaller than the sum of its proper divisors (262598548).

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

203421020 is a wasteful number, since it uses less digits than its factorization.

203421020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924661 (or 924659 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 203421020 is about 14262.5741014727. The cubic root of 203421020 is about 588.1190890571.

Adding to 203421020 its reverse (20124302), we get a palindrome (223545322).

The spelling of 203421020 in words is "two hundred three million, four hundred twenty-one thousand, twenty".