20523673894 has 8 divisors (see below), whose sum is σ = 30899111328. Its totient is φ = 10223970120.

The previous prime is 20523673889. The next prime is 20523673903. The reversal of 20523673894 is 49837632502.

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

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 3 ways as a sum of consecutive naturals, for example, 18932737 + ... + 18933820.

It is an arithmetic number, because the mean of its divisors is an integer number (3862388916).

Almost surely, 2^20523673894 is an apocalyptic number.

20523673894 is a deficient number, since it is larger than the sum of its proper divisors (10375437434).

20523673894 is a wasteful number, since it uses less digits than its factorization.

20523673894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37866830.

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 20523673894 in words is "twenty billion, five hundred twenty-three million, six hundred seventy-three thousand, eight hundred ninety-four".