19955126417 has 8 divisors (see below), whose sum is σ = 20496667392. Its totient is φ = 19413702000.

The previous prime is 19955126363. The next prime is 19955126419. The reversal of 19955126417 is 71462155991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19955126417 - 2⁸ = 19955126161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19955126419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 404042 + ... + 450732.

It is an arithmetic number, because the mean of its divisors is an integer number (2562083424).

Almost surely, 2^19955126417 is an apocalyptic number.

It is an amenable number.

19955126417 is a deficient number, since it is larger than the sum of its proper divisors (541540975).

19955126417 is a wasteful number, since it uses less digits than its factorization.

19955126417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58279.

The product of its digits is 680400, while the sum is 50.

The spelling of 19955126417 in words is "nineteen billion, nine hundred fifty-five million, one hundred twenty-six thousand, four hundred seventeen".