20453471878 has 32 divisors (see below), whose sum is σ = 36606795264. Its totient is φ = 8380249152.

The previous prime is 20453471789. The next prime is 20453471897. The reversal of 20453471878 is 87817435402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637026 + ... + 668362.

It is an arithmetic number, because the mean of its divisors is an integer number (1143962352).

Almost surely, 2^20453471878 is an apocalyptic number.

20453471878 is a deficient number, since it is larger than the sum of its proper divisors (16153323386).

20453471878 is a wasteful number, since it uses less digits than its factorization.

20453471878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33396.

The product of its (nonzero) digits is 1505280, while the sum is 49.

The spelling of 20453471878 in words is "twenty billion, four hundred fifty-three million, four hundred seventy-one thousand, eight hundred seventy-eight".