20453520505511 has 2 divisors, whose sum is σ = 20453520505512. Its totient is φ = 20453520505510.

The previous prime is 20453520505507. The next prime is 20453520505567. The reversal of 20453520505511 is 11550502535402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20453520505511 - 2² = 20453520505507 is a prime.

It is a super-2 number, since 2×20453520505511² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20453520504511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226760252755 + 10226760252756.

It is an arithmetic number, because the mean of its divisors is an integer number (10226760252756).

Almost surely, 2^{20453520505511} is an apocalyptic number.

20453520505511 is a deficient number, since it is larger than the sum of its proper divisors (1).

20453520505511 is an equidigital number, since it uses as much as digits as its factorization.

20453520505511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 20453520505511 in words is "twenty trillion, four hundred fifty-three billion, five hundred twenty million, five hundred five thousand, five hundred eleven".