20511626453011 has 4 divisors (see below), whose sum is σ = 20584105698712. Its totient is φ = 20439147207312.

The previous prime is 20511626452991. The next prime is 20511626453027. The reversal of 20511626453011 is 11035462611502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20511626453011 - 2¹⁹ = 20511625928723 is a prime.

It is a super-2 number, since 2×20511626453011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20511626453041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36239622426 + ... + 36239622991.

It is an arithmetic number, because the mean of its divisors is an integer number (5146026424678).

Almost surely, 2^{20511626453011} is an apocalyptic number.

20511626453011 is a deficient number, since it is larger than the sum of its proper divisors (72479245701).

20511626453011 is an equidigital number, since it uses as much as digits as its factorization.

20511626453011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72479245700.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 20511626453011 in words is "twenty trillion, five hundred eleven billion, six hundred twenty-six million, four hundred fifty-three thousand, eleven".