20910549393 has 12 divisors (see below), whose sum is σ = 30224458368. Its totient is φ = 13930982520.

The previous prime is 20910549391. The next prime is 20910549419. The reversal of 20910549393 is 39394501902.

20910549393 is a `hidden beast` number, since 2 + 0 + 9 + 10 + 549 + 3 + 93 = 666.

It is not a de Polignac number, because 20910549393 - 2¹ = 20910549391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20910549391) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 767853 + ... + 794618.

It is an arithmetic number, because the mean of its divisors is an integer number (2518704864).

Almost surely, 2^20910549393 is an apocalyptic number.

It is an amenable number.

20910549393 is a deficient number, since it is larger than the sum of its proper divisors (9313908975).

20910549393 is a wasteful number, since it uses less digits than its factorization.

20910549393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563964 (or 1563961 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The spelling of 20910549393 in words is "twenty billion, nine hundred ten million, five hundred forty-nine thousand, three hundred ninety-three".