19955388038164 has 48 divisors (see below), whose sum is σ = 36954517017600. Its totient is φ = 9402520089600.

The previous prime is 19955388038137. The next prime is 19955388038197. The reversal of 19955388038164 is 46183088355991.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19955388038093 and 19955388038102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371713404 + ... + 371767084.

It is an arithmetic number, because the mean of its divisors is an integer number (769885771200).

Almost surely, 2^{19955388038164} is an apocalyptic number.

It is an amenable number.

19955388038164 is a deficient number, since it is larger than the sum of its proper divisors (16999128979436).

19955388038164 is a wasteful number, since it uses less digits than its factorization.

19955388038164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79504 (or 79502 counting only the distinct ones).

The product of its (nonzero) digits is 223948800, while the sum is 70.

The spelling of 19955388038164 in words is "nineteen trillion, nine hundred fifty-five billion, three hundred eighty-eight million, thirty-eight thousand, one hundred sixty-four".