21340341412 has 48 divisors (see below), whose sum is σ = 41763948912. Its totient is φ = 9477457920.

The previous prime is 21340341391. The next prime is 21340341431. The reversal of 21340341412 is 21414304312.

It can be written as a sum of positive squares in 8 ways, for example, as 5187456576 + 16152884836 = 72024^2 + 127094^2 .

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, 87078 + ... + 224194.

It is an arithmetic number, because the mean of its divisors is an integer number (870082269).

Almost surely, 2^21340341412 is an apocalyptic number.

It is an amenable number.

21340341412 is a deficient number, since it is larger than the sum of its proper divisors (20423607500).

21340341412 is a wasteful number, since it uses less digits than its factorization.

21340341412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137248 (or 137246 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21340341412 its reverse (21414304312), we get a palindrome (42754645724).

The spelling of 21340341412 in words is "twenty-one billion, three hundred forty million, three hundred forty-one thousand, four hundred twelve".