20694118057 has 8 divisors (see below), whose sum is σ = 21139073600. Its totient is φ = 20252572560.

The previous prime is 20694118051. The next prime is 20694118063. The reversal of 20694118057 is 75081149602.

It is an interprime number because it is at equal distance from previous prime (20694118051) and next prime (20694118063).

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 20694118057 - 2⁷ = 20694117929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20694118051) 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 7 ways as a sum of consecutive naturals, for example, 840243 + ... + 864520.

It is an arithmetic number, because the mean of its divisors is an integer number (2642384200).

Almost surely, 2^20694118057 is an apocalyptic number.

It is an amenable number.

20694118057 is a deficient number, since it is larger than the sum of its proper divisors (444955543).

20694118057 is a wasteful number, since it uses less digits than its factorization.

20694118057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705023.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 20694118057 in words is "twenty billion, six hundred ninety-four million, one hundred eighteen thousand, fifty-seven".