20325491678 has 4 divisors (see below), whose sum is σ = 30488237520. Its totient is φ = 10162745838.

The previous prime is 20325491657. The next prime is 20325491687. The reversal of 20325491678 is 87619452302.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20325491678² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5081372918 + ... + 5081372921.

It is an arithmetic number, because the mean of its divisors is an integer number (7622059380).

It is a 1-persistent number, because it is pandigital, but 2⋅20325491678 = 40650983356 is not.

Almost surely, 2^20325491678 is an apocalyptic number.

20325491678 is a deficient number, since it is larger than the sum of its proper divisors (10162745842).

20325491678 is a wasteful number, since it uses less digits than its factorization.

20325491678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10162745841.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20325491678 in words is "twenty billion, three hundred twenty-five million, four hundred ninety-one thousand, six hundred seventy-eight".