20907384424 has 8 divisors (see below), whose sum is σ = 39201345810. Its totient is φ = 10453692208.

The previous prime is 20907384361. The next prime is 20907384457. The reversal of 20907384424 is 42448370902.

It can be written as a sum of positive squares in only one way, i.e., 20658312900 + 249071524 = 143730^2 + 15782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1306711519 + ... + 1306711534.

Almost surely, 2^20907384424 is an apocalyptic number.

It is an amenable number.

20907384424 is a deficient number, since it is larger than the sum of its proper divisors (18293961386).

20907384424 is a wasteful number, since it uses less digits than its factorization.

20907384424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613423059 (or 2613423055 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The spelling of 20907384424 in words is "twenty billion, nine hundred seven million, three hundred eighty-four thousand, four hundred twenty-four".