19997937845088 has 576 divisors, whose sum is σ = 63220882233600. Its totient is φ = 5514649620480.

The previous prime is 19997937845087. The next prime is 19997937845111. The reversal of 19997937845088 is 88054873979991.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19997937844995 and 19997937845013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19997937845087) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23280486003 + ... + 23280486861.

It is an arithmetic number, because the mean of its divisors is an integer number (109758476100).

Almost surely, 2^{19997937845088} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19997937845088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31610441116800).

19997937845088 is an abundant number, since it is smaller than the sum of its proper divisors (43222944388512).

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

19997937845088 is a wasteful number, since it uses less digits than its factorization.

19997937845088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 9876142080, while the sum is 87.

The spelling of 19997937845088 in words is "nineteen trillion, nine hundred ninety-seven billion, nine hundred thirty-seven million, eight hundred forty-five thousand, eighty-eight".