20917548486 has 16 divisors (see below), whose sum is σ = 46483441200. Its totient is φ = 6972516144.

The previous prime is 20917548451. The next prime is 20917548497. The reversal of 20917548486 is 68484571902.

It is a happy number.

20917548486 is a `hidden beast` number, since 2 + 0 + 9 + 17 + 548 + 4 + 86 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 387362009 = 20917548486 / (2 + 0 + 9 + 1 + 7 + 5 + 4 + 8 + 4 + 8 + 6).

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 7 ways as a sum of consecutive naturals, for example, 193680951 + ... + 193681058.

It is an arithmetic number, because the mean of its divisors is an integer number (2905215075).

Almost surely, 2^20917548486 is an apocalyptic number.

20917548486 is an abundant number, since it is smaller than the sum of its proper divisors (25565892714).

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

20917548486 is a wasteful number, since it uses less digits than its factorization.

20917548486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387362020 (or 387362014 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 20917548486 in words is "twenty billion, nine hundred seventeen million, five hundred forty-eight thousand, four hundred eighty-six".