20858168380 has 48 divisors (see below), whose sum is σ = 50149665216. Its totient is φ = 7138506240.

The previous prime is 20858168363. The next prime is 20858168417. The reversal of 20858168380 is 8386185802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55761 + ... + 211720.

It is an arithmetic number, because the mean of its divisors is an integer number (1044784692).

Almost surely, 2^20858168380 is an apocalyptic number.

20858168380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20858168380 is an abundant number, since it is smaller than the sum of its proper divisors (29291496836).

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

20858168380 is a wasteful number, since it uses less digits than its factorization.

20858168380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268054 (or 268052 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 49.

The spelling of 20858168380 in words is "twenty billion, eight hundred fifty-eight million, one hundred sixty-eight thousand, three hundred eighty".