20754755117 has 4 divisors (see below), whose sum is σ = 20821490976. Its totient is φ = 20688019260.

The previous prime is 20754755113. The next prime is 20754755143. The reversal of 20754755117 is 71155745702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20754755117 - 2² = 20754755113 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20754755113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33367463 + ... + 33368084.

It is an arithmetic number, because the mean of its divisors is an integer number (5205372744).

Almost surely, 2^20754755117 is an apocalyptic number.

It is an amenable number.

20754755117 is a deficient number, since it is larger than the sum of its proper divisors (66735859).

20754755117 is an equidigital number, since it uses as much as digits as its factorization.

20754755117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66735858.

The product of its (nonzero) digits is 343000, while the sum is 44.

The spelling of 20754755117 in words is "twenty billion, seven hundred fifty-four million, seven hundred fifty-five thousand, one hundred seventeen".