20081257707 has 16 divisors (see below), whose sum is σ = 30602575872. Its totient is φ = 11474042880.

The previous prime is 20081257687. The next prime is 20081257733. The reversal of 20081257707 is 70775218002.

It is not a de Polignac number, because 20081257707 - 2⁷ = 20081257579 is a prime.

It is a super-2 number, since 2×20081257707² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20081257307) 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, 273643 + ... + 339179.

It is an arithmetic number, because the mean of its divisors is an integer number (1912660992).

Almost surely, 2^20081257707 is an apocalyptic number.

20081257707 is a deficient number, since it is larger than the sum of its proper divisors (10521318165).

20081257707 is a wasteful number, since it uses less digits than its factorization.

20081257707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80138.

The product of its (nonzero) digits is 54880, while the sum is 39.

The spelling of 20081257707 in words is "twenty billion, eighty-one million, two hundred fifty-seven thousand, seven hundred seven".