20381621206463 has 8 divisors (see below), whose sum is σ = 22566354009600. Its totient is φ = 18252198094680.

The previous prime is 20381621206459. The next prime is 20381621206477. The reversal of 20381621206463 is 36460212618302.

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

It is not a de Polignac number, because 20381621206463 - 2² = 20381621206459 is a prime.

It is a super-3 number, since 3×20381621206463³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381621206423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13827422063 + ... + 13827423536.

It is an arithmetic number, because the mean of its divisors is an integer number (2820794251200).

Almost surely, 2^{20381621206463} is an apocalyptic number.

20381621206463 is a deficient number, since it is larger than the sum of its proper divisors (2184732803137).

20381621206463 is a wasteful number, since it uses less digits than its factorization.

20381621206463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27654845677.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 20381621206463 in words is "twenty trillion, three hundred eighty-one billion, six hundred twenty-one million, two hundred six thousand, four hundred sixty-three".