19971601836948 has 96 divisors (see below), whose sum is σ = 53565083510400. Its totient is φ = 6427473921792.

The previous prime is 19971601836943. The next prime is 19971601836961. The reversal of 19971601836948 is 84963810617991.

19971601836948 is a `hidden beast` number, since 1 + 9 + 9 + 7 + 1 + 601 + 8 + 3 + 6 + 9 + 4 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19971601836941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186121840 + ... + 186229112.

It is an arithmetic number, because the mean of its divisors is an integer number (557969619900).

Almost surely, 2^{19971601836948} is an apocalyptic number.

19971601836948 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19971601836948 is an abundant number, since it is smaller than the sum of its proper divisors (33593481673452).

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

19971601836948 is a wasteful number, since it uses less digits than its factorization.

19971601836948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166758 (or 166750 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

The spelling of 19971601836948 in words is "nineteen trillion, nine hundred seventy-one billion, six hundred one million, eight hundred thirty-six thousand, nine hundred forty-eight".