20183798961 has 24 divisors (see below), whose sum is σ = 29241164160. Its totient is φ = 13415869536.

The previous prime is 20183798951. The next prime is 20183798963. The reversal of 20183798961 is 16989738102.

20183798961 is a `hidden beast` number, since 201 + 8 + 379 + 8 + 9 + 61 = 666.

It is not a de Polignac number, because 20183798961 - 2¹⁰ = 20183797937 is a prime.

It is a super-3 number, since 3×20183798961³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20183798898 and 20183798907.

It is not an unprimeable number, because it can be changed into a prime (20183798963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6810466 + ... + 6813428.

It is an arithmetic number, because the mean of its divisors is an integer number (1218381840).

Almost surely, 2^20183798961 is an apocalyptic number.

It is an amenable number.

20183798961 is a deficient number, since it is larger than the sum of its proper divisors (9057365199).

20183798961 is a wasteful number, since it uses less digits than its factorization.

20183798961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965 (or 4962 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 20183798961 in words is "twenty billion, one hundred eighty-three million, seven hundred ninety-eight thousand, nine hundred sixty-one".