203356406344 has 128 divisors (see below), whose sum is σ = 472825382400. Its totient is φ = 79843184640.

The previous prime is 203356406339. The next prime is 203356406369. The reversal of 203356406344 is 443604653302.

It is a happy number.

It is a super-2 number, since 2×203356406344² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 203356406297 and 203356406306.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149416224 + ... + 149417584.

It is an arithmetic number, because the mean of its divisors is an integer number (3693948300).

Almost surely, 2^203356406344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203356406344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236412691200).

203356406344 is an abundant number, since it is smaller than the sum of its proper divisors (269468976056).

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

203356406344 is a wasteful number, since it uses less digits than its factorization.

203356406344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2783 (or 2779 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 40.

The spelling of 203356406344 in words is "two hundred three billion, three hundred fifty-six million, four hundred six thousand, three hundred forty-four".