20507361408 has 64 divisors (see below), whose sum is σ = 60525208800. Its totient is φ = 6835785984.

The previous prime is 20507361337. The next prime is 20507361419. The reversal of 20507361408 is 80416370502.

20507361408 is a `hidden beast` number, since 2 + 0 + 507 + 3 + 6 + 140 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2963466 + ... + 2970377.

Almost surely, 2^20507361408 is an apocalyptic number.

It is an amenable number.

20507361408 is an abundant number, since it is smaller than the sum of its proper divisors (40017847392).

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

20507361408 is an equidigital number, since it uses as much as digits as its factorization.

20507361408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5933866 (or 5933848 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 20507361408 in words is "twenty billion, five hundred seven million, three hundred sixty-one thousand, four hundred eight".