20225448236537 has 2 divisors, whose sum is σ = 20225448236538. Its totient is φ = 20225448236536.

The previous prime is 20225448236527. The next prime is 20225448236557. The reversal of 20225448236537 is 73563284452202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20208450335161 + 16997901376 = 4495381^2 + 130376^2 .

It is a cyclic number.

It is not a de Polignac number, because 20225448236537 - 2¹² = 20225448232441 is a prime.

It is a super-3 number, since 3×20225448236537³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20225448236527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10112724118268 + 10112724118269.

It is an arithmetic number, because the mean of its divisors is an integer number (10112724118269).

Almost surely, 2^{20225448236537} is an apocalyptic number.

It is an amenable number.

20225448236537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20225448236537 is an equidigital number, since it uses as much as digits as its factorization.

20225448236537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19353600, while the sum is 53.

The spelling of 20225448236537 in words is "twenty trillion, two hundred twenty-five billion, four hundred forty-eight million, two hundred thirty-six thousand, five hundred thirty-seven".