20797641181 has 16 divisors (see below), whose sum is σ = 22014720000. Its totient is φ = 19615708800.

The previous prime is 20797641127. The next prime is 20797641191. The reversal of 20797641181 is 18114679702.

It is a happy number.

It is not a de Polignac number, because 20797641181 - 2²³ = 20789252573 is a prime.

It is a super-2 number, since 2×20797641181² (a number of 21 digits) contains 22 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 (20797641121) 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, 1312695 + ... + 1328443.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920000).

Almost surely, 2^20797641181 is an apocalyptic number.

It is an amenable number.

20797641181 is a deficient number, since it is larger than the sum of its proper divisors (1217078819).

20797641181 is a wasteful number, since it uses less digits than its factorization.

20797641181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16860.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 20797641181 in words is "twenty billion, seven hundred ninety-seven million, six hundred forty-one thousand, one hundred eighty-one".