203011223420 has 24 divisors (see below), whose sum is σ = 432686610384. Its totient is φ = 79992481536.

The previous prime is 203011223417. The next prime is 203011223431. The reversal of 203011223420 is 24322110302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 203011223392 and 203011223401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75749117 + ... + 75751796.

It is an arithmetic number, because the mean of its divisors is an integer number (18028608766).

Almost surely, 2^203011223420 is an apocalyptic number.

203011223420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203011223420 is an abundant number, since it is smaller than the sum of its proper divisors (229675386964).

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

203011223420 is a wasteful number, since it uses less digits than its factorization.

203011223420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151500989 (or 151500987 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203011223420 its reverse (24322110302), we get a palindrome (227333333722).

The spelling of 203011223420 in words is "two hundred three billion, eleven million, two hundred twenty-three thousand, four hundred twenty".