20757008993 has 16 divisors (see below), whose sum is σ = 25139343744. Its totient is φ = 16730737920.

The previous prime is 20757008953. The next prime is 20757009011. The reversal of 20757008993 is 39980075702.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20757008993 - 2¹² = 20757004897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20757008933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64871 + ... + 213827.

It is an arithmetic number, because the mean of its divisors is an integer number (1571208984).

Almost surely, 2^20757008993 is an apocalyptic number.

It is an amenable number.

20757008993 is a deficient number, since it is larger than the sum of its proper divisors (4382334751).

20757008993 is a wasteful number, since it uses less digits than its factorization.

20757008993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150152.

The product of its (nonzero) digits is 952560, while the sum is 50.

The spelling of 20757008993 in words is "twenty billion, seven hundred fifty-seven million, eight thousand, nine hundred ninety-three".