203453354421 has 16 divisors (see below), whose sum is σ = 302375368320. Its totient is φ = 135202223520.

The previous prime is 203453354399. The next prime is 203453354513. The reversal of 203453354421 is 124453354302.

203453354421 is a `hidden beast` number, since 2 + 0 + 34 + 533 + 54 + 42 + 1 = 666.

It is not a de Polignac number, because 203453354421 - 2⁵ = 203453354389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203453354021) 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 15 ways as a sum of consecutive naturals, for example, 12028785 + ... + 12045686.

It is an arithmetic number, because the mean of its divisors is an integer number (18898460520).

Almost surely, 2^203453354421 is an apocalyptic number.

It is an amenable number.

203453354421 is a deficient number, since it is larger than the sum of its proper divisors (98922013899).

203453354421 is a wasteful number, since it uses less digits than its factorization.

203453354421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24074793 (or 24074787 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The spelling of 203453354421 in words is "two hundred three billion, four hundred fifty-three million, three hundred fifty-four thousand, four hundred twenty-one".