20709071929 has 32 divisors (see below), whose sum is σ = 26337920000. Its totient is φ = 16177516992.

The previous prime is 20709071927. The next prime is 20709071947. The reversal of 20709071929 is 92917090702.

It is not a de Polignac number, because 20709071929 - 2¹ = 20709071927 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20709071927) 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, 322867 + ... + 381655.

It is an arithmetic number, because the mean of its divisors is an integer number (823060000).

Almost surely, 2^20709071929 is an apocalyptic number.

It is an amenable number.

20709071929 is a deficient number, since it is larger than the sum of its proper divisors (5628848071).

20709071929 is an equidigital number, since it uses as much as digits as its factorization.

20709071929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58902 (or 58888 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 46.

The spelling of 20709071929 in words is "twenty billion, seven hundred nine million, seventy-one thousand, nine hundred twenty-nine".