21402442433012 has 12 divisors (see below), whose sum is σ = 38251173710400. Its totient is φ = 10473535658616.

The previous prime is 21402442433011. The next prime is 21402442433041. The reversal of 21402442433012 is 21033424420412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21402442433012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402442433011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56921389262 + ... + 56921389637.

It is an arithmetic number, because the mean of its divisors is an integer number (3187597809200).

Almost surely, 2^{21402442433012} is an apocalyptic number.

It is an amenable number.

21402442433012 is a deficient number, since it is larger than the sum of its proper divisors (16848731277388).

21402442433012 is a wasteful number, since it uses less digits than its factorization.

21402442433012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113842778950 (or 113842778948 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21402442433012 its reverse (21033424420412), we get a palindrome (42435866853424).

The spelling of 21402442433012 in words is "twenty-one trillion, four hundred two billion, four hundred forty-two million, four hundred thirty-three thousand, twelve".