20146261954478 has 8 divisors (see below), whose sum is σ = 32966610471000. Its totient is φ = 9157391797480.

The previous prime is 20146261954477. The next prime is 20146261954517. The reversal of 20146261954478 is 87445916264102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146261954477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457869589853 + ... + 457869589896.

It is an arithmetic number, because the mean of its divisors is an integer number (4120826308875).

Almost surely, 2^{20146261954478} is an apocalyptic number.

20146261954478 is a deficient number, since it is larger than the sum of its proper divisors (12820348516522).

20146261954478 is a wasteful number, since it uses less digits than its factorization.

20146261954478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915739179762.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 20146261954478 in words is "twenty trillion, one hundred forty-six billion, two hundred sixty-one million, nine hundred fifty-four thousand, four hundred seventy-eight".