21340036234 has 16 divisors (see below), whose sum is σ = 35046134496. Its totient is φ = 9664995600.

The previous prime is 21340036217. The next prime is 21340036243. The reversal of 21340036234 is 43263004312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1744812 + ... + 1756999.

It is an arithmetic number, because the mean of its divisors is an integer number (2190383406).

Almost surely, 2^21340036234 is an apocalyptic number.

21340036234 is a deficient number, since it is larger than the sum of its proper divisors (13706098262).

21340036234 is a wasteful number, since it uses less digits than its factorization.

21340036234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502101.

The product of its (nonzero) digits is 10368, while the sum is 28.

The spelling of 21340036234 in words is "twenty-one billion, three hundred forty million, thirty-six thousand, two hundred thirty-four".