20203423400 has 48 divisors (see below), whose sum is σ = 47101122240. Its totient is φ = 8059320000.

The previous prime is 20203423391. The next prime is 20203423433. The reversal of 20203423400 is 432430202.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64226 + ... + 211025.

It is an arithmetic number, because the mean of its divisors is an integer number (981273380).

Almost surely, 2^20203423400 is an apocalyptic number.

20203423400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20203423400 is an abundant number, since it is smaller than the sum of its proper divisors (26897698840).

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

20203423400 is a wasteful number, since it uses less digits than its factorization.

20203423400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275634 (or 275625 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 20203423400 its reverse (432430202), we get a palindrome (20635853602).

The spelling of 20203423400 in words is "twenty billion, two hundred three million, four hundred twenty-three thousand, four hundred".