21246955864234 has 8 divisors (see below), whose sum is σ = 32103064700388. Its totient is φ = 10545934297440.

The previous prime is 21246955864223. The next prime is 21246955864241. The reversal of 21246955864234 is 43246855964212.

It can be written as a sum of positive squares in 2 ways, for example, as 20068204860025 + 1178751004209 = 4479755^2 + 1085703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38771816997 + ... + 38771817544.

Almost surely, 2^{21246955864234} is an apocalyptic number.

21246955864234 is a deficient number, since it is larger than the sum of its proper divisors (10856108836154).

21246955864234 is a wasteful number, since it uses less digits than its factorization.

21246955864234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77543634680.

The product of its digits is 99532800, while the sum is 61.

The spelling of 21246955864234 in words is "twenty-one trillion, two hundred forty-six billion, nine hundred fifty-five million, eight hundred sixty-four thousand, two hundred thirty-four".