20386432901 has 8 divisors (see below), whose sum is σ = 20939546904. Its totient is φ = 19833431040.

The previous prime is 20386432897. The next prime is 20386432909. The reversal of 20386432901 is 10923468302.

It can be written as a sum of positive squares in 4 ways, for example, as 17622828001 + 2763604900 = 132751^2 + 52570^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20386432901 - 2² = 20386432897 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386432909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449021 + ... + 492333.

It is an arithmetic number, because the mean of its divisors is an integer number (2617443363).

Almost surely, 2^20386432901 is an apocalyptic number.

It is an amenable number.

20386432901 is a deficient number, since it is larger than the sum of its proper divisors (553114003).

20386432901 is a wasteful number, since it uses less digits than its factorization.

20386432901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56071.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 20386432901 in words is "twenty billion, three hundred eighty-six million, four hundred thirty-two thousand, nine hundred one".