20557006707 has 8 divisors (see below), whose sum is σ = 27410042880. Its totient is φ = 13704320840.

The previous prime is 20557006643. The next prime is 20557006711. The reversal of 20557006707 is 70760075502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20557006707 - 2⁶ = 20557006643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20557006007) 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 7 ways as a sum of consecutive naturals, for example, 118894 + ... + 235052.

It is an arithmetic number, because the mean of its divisors is an integer number (3426255360).

Almost surely, 2^20557006707 is an apocalyptic number.

20557006707 is a deficient number, since it is larger than the sum of its proper divisors (6853036173).

20557006707 is a wasteful number, since it uses less digits than its factorization.

20557006707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175153.

The product of its (nonzero) digits is 102900, while the sum is 39.

The spelling of 20557006707 in words is "twenty billion, five hundred fifty-seven million, six thousand, seven hundred seven".