19890282947148 has 18 divisors (see below), whose sum is σ = 50278215227604. Its totient is φ = 6630094315704.

The previous prime is 19890282947147. The next prime is 19890282947173. The reversal of 19890282947148 is 84174928209891.

19890282947148 is a `hidden beast` number, since 1 + 9 + 8 + 90 + 2 + 8 + 29 + 471 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×19890282947148² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19890282947147) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 276253929786 + ... + 276253929857.

Almost surely, 2^{19890282947148} is an apocalyptic number.

19890282947148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19890282947148 is an abundant number, since it is smaller than the sum of its proper divisors (30387932280456).

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

19890282947148 is a wasteful number, since it uses less digits than its factorization.

19890282947148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552507859653 (or 552507859648 counting only the distinct ones).

The product of its (nonzero) digits is 167215104, while the sum is 72.

The spelling of 19890282947148 in words is "nineteen trillion, eight hundred ninety billion, two hundred eighty-two million, nine hundred forty-seven thousand, one hundred forty-eight".