20511313102043 has 8 divisors (see below), whose sum is σ = 20547527835120. Its totient is φ = 20475099394560.

The previous prime is 20511313101949. The next prime is 20511313102069. The reversal of 20511313102043 is 34020131311502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20511313102043 - 2²⁶ = 20511245993179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20511313132043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47668163 + ... + 48096531.

It is an arithmetic number, because the mean of its divisors is an integer number (2568440979390).

Almost surely, 2^{20511313102043} is an apocalyptic number.

20511313102043 is a deficient number, since it is larger than the sum of its proper divisors (36214733077).

20511313102043 is an equidigital number, since it uses as much as digits as its factorization.

20511313102043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512797.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 20511313102043 its reverse (34020131311502), we get a palindrome (54531444413545).

The spelling of 20511313102043 in words is "twenty trillion, five hundred eleven billion, three hundred thirteen million, one hundred two thousand, forty-three".