21263222243346 has 32 divisors (see below), whose sum is σ = 42862233643008. Its totient is φ = 7031778324480.

The previous prime is 21263222243311. The next prime is 21263222243359. The reversal of 21263222243346 is 64334222236212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21263222243298 and 21263222243307.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37760316 + ... + 38319288.

It is an arithmetic number, because the mean of its divisors is an integer number (1339444801344).

Almost surely, 2^{21263222243346} is an apocalyptic number.

21263222243346 is an abundant number, since it is smaller than the sum of its proper divisors (21599011399662).

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

21263222243346 is a wasteful number, since it uses less digits than its factorization.

21263222243346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609026.

The product of its digits is 995328, while the sum is 42.

Adding to 21263222243346 its reverse (64334222236212), we get a palindrome (85597444479558).

The spelling of 21263222243346 in words is "twenty-one trillion, two hundred sixty-three billion, two hundred twenty-two million, two hundred forty-three thousand, three hundred forty-six".