19948006326978 has 48 divisors (see below), whose sum is σ = 43289428643136. Its totient is φ = 6638761550880.

The previous prime is 19948006326971. The next prime is 19948006327009. The reversal of 19948006326978 is 87962360084991.

19948006326978 is a `hidden beast` number, since 19 + 9 + 480 + 0 + 6 + 3 + 2 + 69 + 78 = 666.

It is a super-2 number, since 2×19948006326978² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19948006326971) 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, 89529400 + ... + 89751932.

It is an arithmetic number, because the mean of its divisors is an integer number (901863096732).

Almost surely, 2^{19948006326978} is an apocalyptic number.

19948006326978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19948006326978 is an abundant number, since it is smaller than the sum of its proper divisors (23341422316158).

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

19948006326978 is a wasteful number, since it uses less digits than its factorization.

19948006326978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230439 (or 230436 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 72.

The spelling of 19948006326978 in words is "nineteen trillion, nine hundred forty-eight billion, six million, three hundred twenty-six thousand, nine hundred seventy-eight".