20140002521 has 2 divisors, whose sum is σ = 20140002522. Its totient is φ = 20140002520.

The previous prime is 20140002517. The next prime is 20140002583. The reversal of 20140002521 is 12520004102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19723393600 + 416608921 = 140440^2 + 20411^2 .

It is a cyclic number.

It is not a de Polignac number, because 20140002521 - 2² = 20140002517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20140002521.

It is not a weakly prime, because it can be changed into another prime (20140052521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10070001260 + 10070001261.

It is an arithmetic number, because the mean of its divisors is an integer number (10070001261).

Almost surely, 2^20140002521 is an apocalyptic number.

It is an amenable number.

20140002521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20140002521 is an equidigital number, since it uses as much as digits as its factorization.

20140002521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 20140002521 its reverse (12520004102), we get a palindrome (32660006623).

The spelling of 20140002521 in words is "twenty billion, one hundred forty million, two thousand, five hundred twenty-one".