19690868421504 has 192 divisors, whose sum is σ = 65818766064480. Its totient is φ = 5533733376000.

The previous prime is 19690868421487. The next prime is 19690868421509. The reversal of 19690868421504 is 40512486809691.

19690868421504 is a `hidden beast` number, since 1 + 9 + 6 + 9 + 0 + 86 + 8 + 42 + 1 + 504 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-3 number, since 3×19690868421504³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19690868421509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19523047 + ... + 20506854.

Almost surely, 2^{19690868421504} is an apocalyptic number.

19690868421504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19690868421504 is an abundant number, since it is smaller than the sum of its proper divisors (46127897642976).

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

19690868421504 is a wasteful number, since it uses less digits than its factorization.

19690868421504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40029989 (or 40029974 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 19690868421504 in words is "nineteen trillion, six hundred ninety billion, eight hundred sixty-eight million, four hundred twenty-one thousand, five hundred four".