21343241400 has 96 divisors (see below), whose sum is σ = 71253616560. Its totient is φ = 5253719040.

The previous prime is 21343241377. The next prime is 21343241471. The reversal of 21343241400 is 414234312.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1360357 + ... + 1375956.

Almost surely, 2^21343241400 is an apocalyptic number.

21343241400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343241400 is an abundant number, since it is smaller than the sum of its proper divisors (49910375160).

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

21343241400 is a wasteful number, since it uses less digits than its factorization.

21343241400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736345 (or 2736336 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21343241400 its reverse (414234312), we get a palindrome (21757475712).

The spelling of 21343241400 in words is "twenty-one billion, three hundred forty-three million, two hundred forty-one thousand, four hundred".