19946054961 has 12 divisors (see below), whose sum is σ = 32926820992. Its totient is φ = 11397745656.

The previous prime is 19946054959. The next prime is 19946054969. The reversal of 19946054961 is 16945064991.

19946054961 is a `hidden beast` number, since 1 + 9 + 94 + 6 + 0 + 549 + 6 + 1 = 666.

It is not a de Polignac number, because 19946054961 - 2¹ = 19946054959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19946054898 and 19946054907.

It is not an unprimeable number, because it can be changed into a prime (19946054969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158301961 + ... + 158302086.

Almost surely, 2^19946054961 is an apocalyptic number.

It is an amenable number.

19946054961 is a deficient number, since it is larger than the sum of its proper divisors (12980766031).

19946054961 is a wasteful number, since it uses less digits than its factorization.

19946054961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316604060 (or 316604057 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 19946054961 in words is "nineteen billion, nine hundred forty-six million, fifty-four thousand, nine hundred sixty-one".