20729142707 has 32 divisors (see below), whose sum is σ = 26052200832. Its totient is φ = 16057626624.

The previous prime is 20729142677. The next prime is 20729142719. The reversal of 20729142707 is 70724192702.

It is not a de Polignac number, because 20729142707 - 2¹² = 20729138611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20729142757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 898703 + ... + 921479.

It is an arithmetic number, because the mean of its divisors is an integer number (814131276).

Almost surely, 2^20729142707 is an apocalyptic number.

20729142707 is a deficient number, since it is larger than the sum of its proper divisors (5323058125).

20729142707 is a wasteful number, since it uses less digits than its factorization.

20729142707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23007.

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 20729142707 in words is "twenty billion, seven hundred twenty-nine million, one hundred forty-two thousand, seven hundred seven".