203321011020 has 48 divisors (see below), whose sum is σ = 584685292128. Its totient is φ = 52753559040.

The previous prime is 203321010989. The next prime is 203321011067. The reversal of 203321011020 is 20110123302.

It is a super-2 number, since 2×203321011020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45790801 + ... + 45795240.

It is an arithmetic number, because the mean of its divisors is an integer number (12180943586).

Almost surely, 2^203321011020 is an apocalyptic number.

203321011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203321011020 is an abundant number, since it is smaller than the sum of its proper divisors (381364281108).

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

203321011020 is a wasteful number, since it uses less digits than its factorization.

203321011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91586090 (or 91586088 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 203321011020 its reverse (20110123302), we get a palindrome (223431134322).

The spelling of 203321011020 in words is "two hundred three billion, three hundred twenty-one million, eleven thousand, twenty".