203145420 has 24 divisors (see below), whose sum is σ = 568807344. Its totient is φ = 54172096.

The previous prime is 203145409. The next prime is 203145443. The reversal of 203145420 is 24541302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1692819 + ... + 1692938.

It is an arithmetic number, because the mean of its divisors is an integer number (23700306).

Almost surely, 2^203145420 is an apocalyptic number.

203145420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203145420 is an abundant number, since it is smaller than the sum of its proper divisors (365661924).

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

203145420 is a wasteful number, since it uses less digits than its factorization.

203145420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385769 (or 3385767 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 203145420 is about 14252.9091767260. The cubic root of 203145420 is about 587.8533694258.

Adding to 203145420 its reverse (24541302), we get a palindrome (227686722).

The spelling of 203145420 in words is "two hundred three million, one hundred forty-five thousand, four hundred twenty".