203400203478 has 8 divisors (see below), whose sum is σ = 406800406968. Its totient is φ = 67800067824.

The previous prime is 203400203449. The next prime is 203400203483. The reversal of 203400203478 is 874302004302.

It is a sphenic number, since it is the product of 3 distinct primes.

203400203478 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16950016951 + ... + 16950016962.

It is an arithmetic number, because the mean of its divisors is an integer number (50850050871).

Almost surely, 2^203400203478 is an apocalyptic number.

203400203478 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

203400203478 is a wasteful number, since it uses less digits than its factorization.

203400203478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33900033918.

The product of its (nonzero) digits is 32256, while the sum is 33.

The spelling of 203400203478 in words is "two hundred three billion, four hundred million, two hundred three thousand, four hundred seventy-eight".