20702847667881 has 16 divisors (see below), whose sum is σ = 29089149724800. Its totient is φ = 13071104851200.

The previous prime is 20702847667867. The next prime is 20702847667919. The reversal of 20702847667881 is 18876674820702.

It is not a de Polignac number, because 20702847667881 - 2¹¹ = 20702847665833 is a prime.

It is a super-2 number, since 2×20702847667881² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20702847662881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1485345856 + ... + 1485359793.

It is an arithmetic number, because the mean of its divisors is an integer number (1818071857800).

Almost surely, 2^{20702847667881} is an apocalyptic number.

It is an amenable number.

20702847667881 is a deficient number, since it is larger than the sum of its proper divisors (8386302056919).

20702847667881 is a wasteful number, since it uses less digits than its factorization.

20702847667881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970705776.

The product of its (nonzero) digits is 101154816, while the sum is 66.

The spelling of 20702847667881 in words is "twenty trillion, seven hundred two billion, eight hundred forty-seven million, six hundred sixty-seven thousand, eight hundred eighty-one".