19101956956 has 6 divisors (see below), whose sum is σ = 33428424680. Its totient is φ = 9550978476.

The previous prime is 19101956947. The next prime is 19101956963. The reversal of 19101956956 is 65965910191.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2387744616 + ... + 2387744623.

Almost surely, 2^19101956956 is an apocalyptic number.

It is an amenable number.

19101956956 is a deficient number, since it is larger than the sum of its proper divisors (14326467724).

19101956956 is a wasteful number, since it uses less digits than its factorization.

19101956956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4775489243 (or 4775489241 counting only the distinct ones).

The product of its (nonzero) digits is 656100, while the sum is 52.

The spelling of 19101956956 in words is "nineteen billion, one hundred one million, nine hundred fifty-six thousand, nine hundred fifty-six".