21413343400 has 48 divisors (see below), whose sum is σ = 49796187840. Its totient is φ = 8563588800.

The previous prime is 21413343373. The next prime is 21413343431. The reversal of 21413343400 is 434331412.

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 1474977 + ... + 1489423.

It is an arithmetic number, because the mean of its divisors is an integer number (1037420580).

Almost surely, 2^21413343400 is an apocalyptic number.

21413343400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21413343400 is an abundant number, since it is smaller than the sum of its proper divisors (28382844440).

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

21413343400 is a wasteful number, since it uses less digits than its factorization.

21413343400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21874 (or 21865 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21413343400 its reverse (434331412), we get a palindrome (21847674812).

The spelling of 21413343400 in words is "twenty-one billion, four hundred thirteen million, three hundred forty-three thousand, four hundred".