203020034556 has 12 divisors (see below), whose sum is σ = 473713413992. Its totient is φ = 67673344848.

The previous prime is 203020034551. The next prime is 203020034561. The reversal of 203020034556 is 655430020302.

It is an interprime number because it is at equal distance from previous prime (203020034551) and next prime (203020034561).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×203020034556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203020034551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8459168095 + ... + 8459168118.

Almost surely, 2^203020034556 is an apocalyptic number.

It is an amenable number.

203020034556 is an abundant number, since it is smaller than the sum of its proper divisors (270693379436).

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

203020034556 is a wasteful number, since it uses less digits than its factorization.

203020034556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16918336220 (or 16918336218 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 203020034556 its reverse (655430020302), we get a palindrome (858450054858).

The spelling of 203020034556 in words is "two hundred three billion, twenty million, thirty-four thousand, five hundred fifty-six".