19992801255992 has 8 divisors (see below), whose sum is σ = 37486502355000. Its totient is φ = 9996400627992.

The previous prime is 19992801255991. The next prime is 19992801256009. The reversal of 19992801255992 is 29955210829991.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19992801255991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249550078492 + ... + 1249550078507.

It is an arithmetic number, because the mean of its divisors is an integer number (4685812794375).

Almost surely, 2^{19992801255992} is an apocalyptic number.

It is an amenable number.

19992801255992 is a deficient number, since it is larger than the sum of its proper divisors (17493701099008).

19992801255992 is a wasteful number, since it uses less digits than its factorization.

19992801255992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499100157005 (or 2499100157001 counting only the distinct ones).

The product of its (nonzero) digits is 94478400, while the sum is 71.

The spelling of 19992801255992 in words is "nineteen trillion, nine hundred ninety-two billion, eight hundred one million, two hundred fifty-five thousand, nine hundred ninety-two".