20620571491486 has 16 divisors (see below), whose sum is σ = 32559455036160. Its totient is φ = 9767441744280.

The previous prime is 20620571491379. The next prime is 20620571491519. The reversal of 20620571491486 is 68419417502602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3568996 + ... + 7347031.

It is an arithmetic number, because the mean of its divisors is an integer number (2034965939760).

Almost surely, 2^{20620571491486} is an apocalyptic number.

20620571491486 is a deficient number, since it is larger than the sum of its proper divisors (11938883544674).

20620571491486 is a wasteful number, since it uses less digits than its factorization.

20620571491486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10965759.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 20620571491486 in words is "twenty trillion, six hundred twenty billion, five hundred seventy-one million, four hundred ninety-one thousand, four hundred eighty-six".