20453633017 has 2 divisors, whose sum is σ = 20453633018. Its totient is φ = 20453633016.

The previous prime is 20453632987. The next prime is 20453633023. The reversal of 20453633017 is 71033635402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10327437376 + 10126195641 = 101624^2 + 100629^2 .

It is a cyclic number.

It is not a de Polignac number, because 20453633017 - 2¹⁵ = 20453600249 is a prime.

It is a super-2 number, since 2×20453633017² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20453633117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226816508 + 10226816509.

It is an arithmetic number, because the mean of its divisors is an integer number (10226816509).

Almost surely, 2^20453633017 is an apocalyptic number.

It is an amenable number.

20453633017 is a deficient number, since it is larger than the sum of its proper divisors (1).

20453633017 is an equidigital number, since it uses as much as digits as its factorization.

20453633017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 34.

The spelling of 20453633017 in words is "twenty billion, four hundred fifty-three million, six hundred thirty-three thousand, seventeen".