20070071057 has 16 divisors (see below), whose sum is σ = 20847690240. Its totient is φ = 19300982400.

The previous prime is 20070071029. The next prime is 20070071071. The reversal of 20070071057 is 75017007002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20070071057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20070071017) 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, 3409757 + ... + 3415637.

It is an arithmetic number, because the mean of its divisors is an integer number (1302980640).

Almost surely, 2^20070071057 is an apocalyptic number.

It is an amenable number.

20070071057 is a deficient number, since it is larger than the sum of its proper divisors (777619183).

20070071057 is a wasteful number, since it uses less digits than its factorization.

20070071057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6584.

The product of its (nonzero) digits is 3430, while the sum is 29.

Adding to 20070071057 its reverse (75017007002), we get a palindrome (95087078059).

The spelling of 20070071057 in words is "twenty billion, seventy million, seventy-one thousand, fifty-seven".