20555555741 has 4 divisors (see below), whose sum is σ = 23492063712. Its totient is φ = 17619047772.

The previous prime is 20555555737. The next prime is 20555555759. The reversal of 20555555741 is 14755555502.

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 20555555741 - 2² = 20555555737 is a prime.

It is a super-3 number, since 3×20555555741³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20555555692 and 20555555701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555555701) 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, 1468253975 + ... + 1468253988.

It is an arithmetic number, because the mean of its divisors is an integer number (5873015928).

Almost surely, 2^20555555741 is an apocalyptic number.

It is an amenable number.

20555555741 is a deficient number, since it is larger than the sum of its proper divisors (2936507971).

20555555741 is an equidigital number, since it uses as much as digits as its factorization.

20555555741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936507970.

The product of its (nonzero) digits is 875000, while the sum is 44.

The spelling of 20555555741 in words is "twenty billion, five hundred fifty-five million, five hundred fifty-five thousand, seven hundred forty-one".