19193998940988 has 12 divisors (see below), whose sum is σ = 44785997529000. Its totient is φ = 6397999646992.

The previous prime is 19193998940933. The next prime is 19193998940989. The reversal of 19193998940988 is 88904989939191.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×19193998940988² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19193998940989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799749955863 + ... + 799749955886.

It is an arithmetic number, because the mean of its divisors is an integer number (3732166460750).

Almost surely, 2^{19193998940988} is an apocalyptic number.

It is an amenable number.

19193998940988 is an abundant number, since it is smaller than the sum of its proper divisors (25591998588012).

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

19193998940988 is a wasteful number, since it uses less digits than its factorization.

19193998940988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599499911756 (or 1599499911754 counting only the distinct ones).

The product of its (nonzero) digits is 3265173504, while the sum is 87.

The spelling of 19193998940988 in words is "nineteen trillion, one hundred ninety-three billion, nine hundred ninety-eight million, nine hundred forty thousand, nine hundred eighty-eight".