21206046208934 has 4 divisors (see below), whose sum is σ = 31809069313404. Its totient is φ = 10603023104466.

The previous prime is 21206046208901. The next prime is 21206046208969. The reversal of 21206046208934 is 43980264060212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5301511552232 + ... + 5301511552235.

It is an arithmetic number, because the mean of its divisors is an integer number (7952267328351).

Almost surely, 2^{21206046208934} is an apocalyptic number.

21206046208934 is a deficient number, since it is larger than the sum of its proper divisors (10603023104470).

21206046208934 is a wasteful number, since it uses less digits than its factorization.

21206046208934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10603023104469.

The product of its (nonzero) digits is 995328, while the sum is 47.

The spelling of 21206046208934 in words is "twenty-one trillion, two hundred six billion, forty-six million, two hundred eight thousand, nine hundred thirty-four".