19938938879727 has 48 divisors (see below), whose sum is σ = 34889179253760. Its totient is φ = 10711793776896.

The previous prime is 19938938879663. The next prime is 19938938879737. The reversal of 19938938879727 is 72797883983991.

19938938879727 is a `hidden beast` number, since 1 + 9 + 93 + 8 + 9 + 388 + 79 + 72 + 7 = 666.

It is not a de Polignac number, because 19938938879727 - 2⁶ = 19938938879663 is a prime.

It is a super-2 number, since 2×19938938879727² (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 (19938938879737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9144763 + ... + 11113260.

It is an arithmetic number, because the mean of its divisors is an integer number (726857901120).

Almost surely, 2^{19938938879727} is an apocalyptic number.

19938938879727 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

19938938879727 is a deficient number, since it is larger than the sum of its proper divisors (14950240374033).

19938938879727 is a wasteful number, since it uses less digits than its factorization.

19938938879727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20258972 (or 20258969 counting only the distinct ones).

The product of its digits is 20739898368, while the sum is 90.

The spelling of 19938938879727 in words is "nineteen trillion, nine hundred thirty-eight billion, nine hundred thirty-eight million, eight hundred seventy-nine thousand, seven hundred twenty-seven".