203012252520 has 128 divisors (see below), whose sum is σ = 759318589440. Its totient is φ = 42184362240.

The previous prime is 203012252501. The next prime is 203012252533. The reversal of 203012252520 is 25252210302.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 10976272 + ... + 10994751.

It is an arithmetic number, because the mean of its divisors is an integer number (5932176480).

Almost surely, 2^203012252520 is an apocalyptic number.

203012252520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203012252520 is an abundant number, since it is smaller than the sum of its proper divisors (556306336920).

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

203012252520 is a wasteful number, since it uses less digits than its factorization.

203012252520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21971055 (or 21971051 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

Adding to 203012252520 its reverse (25252210302), we get a palindrome (228264462822).

The spelling of 203012252520 in words is "two hundred three billion, twelve million, two hundred fifty-two thousand, five hundred twenty".