21433003400 has 48 divisors (see below), whose sum is σ = 49850380800. Its totient is φ = 8569993280.

The previous prime is 21433003393. The next prime is 21433003433. The reversal of 21433003400 is 430033412.

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, 557189 + ... + 594411.

It is an arithmetic number, because the mean of its divisors is an integer number (1038549600).

Almost surely, 2^21433003400 is an apocalyptic number.

21433003400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21433003400 is an abundant number, since it is smaller than the sum of its proper divisors (28417377400).

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

21433003400 is a wasteful number, since it uses less digits than its factorization.

21433003400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40118 (or 40109 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21433003400 its reverse (430033412), we get a palindrome (21863036812).

The spelling of 21433003400 in words is "twenty-one billion, four hundred thirty-three million, three thousand, four hundred".