19980962961 has 4 divisors (see below), whose sum is σ = 26641283952. Its totient is φ = 13320641972.

The previous prime is 19980962941. The next prime is 19980963049. The reversal of 19980962961 is 16926908991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19980962961 - 2¹³ = 19980954769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19980962895 and 19980962904.

It is not an unprimeable number, because it can be changed into a prime (19980962941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3330160491 + ... + 3330160496.

It is an arithmetic number, because the mean of its divisors is an integer number (6660320988).

Almost surely, 2^19980962961 is an apocalyptic number.

It is an amenable number.

19980962961 is a deficient number, since it is larger than the sum of its proper divisors (6660320991).

19980962961 is an equidigital number, since it uses as much as digits as its factorization.

19980962961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6660320990.

The product of its (nonzero) digits is 3779136, while the sum is 60.

The spelling of 19980962961 in words is "nineteen billion, nine hundred eighty million, nine hundred sixty-two thousand, nine hundred sixty-one".