20001929201 has 4 divisors (see below), whose sum is σ = 20089274100. Its totient is φ = 19914584304.

The previous prime is 20001929141. The next prime is 20001929209. The reversal of 20001929201 is 10292910002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8456641600 + 11545287601 = 91960^2 + 107449^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001929201 - 2⁶ = 20001929137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001929209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43672106 + ... + 43672563.

It is an arithmetic number, because the mean of its divisors is an integer number (5022318525).

Almost surely, 2^20001929201 is an apocalyptic number.

It is an amenable number.

20001929201 is a deficient number, since it is larger than the sum of its proper divisors (87344899).

20001929201 is an equidigital number, since it uses as much as digits as its factorization.

20001929201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87344898.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 20001929201 in words is "twenty billion, one million, nine hundred twenty-nine thousand, two hundred one".