21403743353412 has 48 divisors (see below), whose sum is σ = 57077429283840. Its totient is φ = 6115271635872.

The previous prime is 21403743353393. The next prime is 21403743353413. The reversal of 21403743353412 is 21435334730412.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (21403743353413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4574289 + ... + 7983207.

It is an arithmetic number, because the mean of its divisors is an integer number (1189113110080).

Almost surely, 2^{21403743353412} is an apocalyptic number.

It is an amenable number.

21403743353412 is an abundant number, since it is smaller than the sum of its proper divisors (35673685930428).

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

21403743353412 is a wasteful number, since it uses less digits than its factorization.

21403743353412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483680 (or 3483678 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 42.

The spelling of 21403743353412 in words is "twenty-one trillion, four hundred three billion, seven hundred forty-three million, three hundred fifty-three thousand, four hundred twelve".