20014517124661 has 2 divisors, whose sum is σ = 20014517124662. Its totient is φ = 20014517124660.

The previous prime is 20014517124611. The next prime is 20014517124773. The reversal of 20014517124661 is 16642171541002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11743773832561 + 8270743292100 = 3426919^2 + 2875890^2 .

It is a cyclic number.

It is not a de Polignac number, because 20014517124661 - 2¹⁵ = 20014517091893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20014517124611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10007258562330 + 10007258562331.

It is an arithmetic number, because the mean of its divisors is an integer number (10007258562331).

Almost surely, 2^{20014517124661} is an apocalyptic number.

It is an amenable number.

20014517124661 is a deficient number, since it is larger than the sum of its proper divisors (1).

20014517124661 is an equidigital number, since it uses as much as digits as its factorization.

20014517124661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

Adding to 20014517124661 its reverse (16642171541002), we get a palindrome (36656688665663).

The spelling of 20014517124661 in words is "twenty trillion, fourteen billion, five hundred seventeen million, one hundred twenty-four thousand, six hundred sixty-one".