20787934001 has 2 divisors, whose sum is σ = 20787934002. Its totient is φ = 20787934000.

The previous prime is 20787933997. The next prime is 20787934003. The reversal of 20787934001 is 10043978702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19693912225 + 1094021776 = 140335^2 + 33076^2 .

It is a cyclic number.

It is not a de Polignac number, because 20787934001 - 2² = 20787933997 is a prime.

It is a Sophie Germain prime.

Together with 20787934003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20787934001.

It is not a weakly prime, because it can be changed into another prime (20787934003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10393967000 + 10393967001.

It is an arithmetic number, because the mean of its divisors is an integer number (10393967001).

Almost surely, 2^20787934001 is an apocalyptic number.

It is an amenable number.

20787934001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20787934001 is an equidigital number, since it uses as much as digits as its factorization.

20787934001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 20787934001 in words is "twenty billion, seven hundred eighty-seven million, nine hundred thirty-four thousand, one".