20144574253537 has 2 divisors, whose sum is σ = 20144574253538. Its totient is φ = 20144574253536.

The previous prime is 20144574253519. The next prime is 20144574253543. The reversal of 20144574253537 is 73535247544102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13533098557696 + 6611475695841 = 3678736^2 + 2571279^2 .

It is a cyclic number.

It is not a de Polignac number, because 20144574253537 - 2⁷ = 20144574253409 is a prime.

It is not a weakly prime, because it can be changed into another prime (20144574253567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10072287126768 + 10072287126769.

It is an arithmetic number, because the mean of its divisors is an integer number (10072287126769).

Almost surely, 2^{20144574253537} is an apocalyptic number.

It is an amenable number.

20144574253537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20144574253537 is an equidigital number, since it uses as much as digits as its factorization.

20144574253537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112000, while the sum is 52.

The spelling of 20144574253537 in words is "twenty trillion, one hundred forty-four billion, five hundred seventy-four million, two hundred fifty-three thousand, five hundred thirty-seven".