21004626506246 has 8 divisors (see below), whose sum is σ = 31812832378704. Its totient is φ = 10400349046680.

The previous prime is 21004626506209. The next prime is 21004626506317. The reversal of 21004626506246 is 64260562640012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21004626506197 and 21004626506206.

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, 50982102965 + ... + 50982103376.

It is an arithmetic number, because the mean of its divisors is an integer number (3976604047338).

Almost surely, 2^{21004626506246} is an apocalyptic number.

21004626506246 is a deficient number, since it is larger than the sum of its proper divisors (10808205872458).

21004626506246 is a wasteful number, since it uses less digits than its factorization.

21004626506246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101964206446.

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 21004626506246 in words is "twenty-one trillion, four billion, six hundred twenty-six million, five hundred six thousand, two hundred forty-six".