21506071244006 has 8 divisors (see below), whose sum is σ = 32259131752944. Its totient is φ = 10753027326360.

The previous prime is 21506071243997. The next prime is 21506071244011. The reversal of 21506071244006 is 60044217060512.

It is a happy number.

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

It is a super-2 number, since 2×21506071244006² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128165 + ... + 6559616.

It is an arithmetic number, because the mean of its divisors is an integer number (4032391469118).

Almost surely, 2^{21506071244006} is an apocalyptic number.

21506071244006 is a deficient number, since it is larger than the sum of its proper divisors (10753060508938).

21506071244006 is a wasteful number, since it uses less digits than its factorization.

21506071244006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8295646.

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 21506071244006 in words is "twenty-one trillion, five hundred six billion, seventy-one million, two hundred forty-four thousand, six".