20857676707 has 16 divisors (see below), whose sum is σ = 25452218880. Its totient is φ = 16703007552.

The previous prime is 20857676689. The next prime is 20857676717. The reversal of 20857676707 is 70767675802.

It is a de Polignac number, because none of the positive numbers 2^k-20857676707 is a prime.

It is a super-2 number, since 2×20857676707² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20857676717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1499482 + ... + 1513327.

It is an arithmetic number, because the mean of its divisors is an integer number (1590763680).

Almost surely, 2^20857676707 is an apocalyptic number.

20857676707 is a deficient number, since it is larger than the sum of its proper divisors (4594542173).

20857676707 is a wasteful number, since it uses less digits than its factorization.

20857676707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3012882.

The product of its (nonzero) digits is 6914880, while the sum is 55.

The spelling of 20857676707 in words is "twenty billion, eight hundred fifty-seven million, six hundred seventy-six thousand, seven hundred seven".