19740259998 has 12 divisors (see below), whose sum is σ = 42770563368. Its totient is φ = 6580086660.

The previous prime is 19740259967. The next prime is 19740259999. The reversal of 19740259998 is 89995204791.

19740259998 is a `hidden beast` number, since 1 + 97 + 402 + 59 + 9 + 98 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19740259999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 548340538 + ... + 548340573.

It is an arithmetic number, because the mean of its divisors is an integer number (3564213614).

Almost surely, 2^19740259998 is an apocalyptic number.

19740259998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19740259998 is an abundant number, since it is smaller than the sum of its proper divisors (23030303370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19740259998 is a wasteful number, since it uses less digits than its factorization.

19740259998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096681119 (or 1096681116 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 63.

The spelling of 19740259998 in words is "nineteen billion, seven hundred forty million, two hundred fifty-nine thousand, nine hundred ninety-eight".