20116755453551 has 4 divisors (see below), whose sum is σ = 20116777402704. Its totient is φ = 20116733504400.

The previous prime is 20116755453461. The next prime is 20116755453569. The reversal of 20116755453551 is 15535455761102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20116755453551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20116755453551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116755453451) 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, 9537035 + ... + 11453756.

It is an arithmetic number, because the mean of its divisors is an integer number (5029194350676).

Almost surely, 2^{20116755453551} is an apocalyptic number.

20116755453551 is a deficient number, since it is larger than the sum of its proper divisors (21949153).

20116755453551 is an equidigital number, since it uses as much as digits as its factorization.

20116755453551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21949152.

The product of its (nonzero) digits is 3150000, while the sum is 50.

The spelling of 20116755453551 in words is "twenty trillion, one hundred sixteen billion, seven hundred fifty-five million, four hundred fifty-three thousand, five hundred fifty-one".