20557108341 has 80 divisors (see below), whose sum is σ = 39177143808. Its totient is φ = 10430532000.

The previous prime is 20557108333. The next prime is 20557108361. The reversal of 20557108341 is 14380175502.

20557108341 is a `hidden beast` number, since 2 + 0 + 5 + 571 + 0 + 83 + 4 + 1 = 666.

It is not a de Polignac number, because 20557108341 - 2³ = 20557108333 is a prime.

It is a super-2 number, since 2×20557108341² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20557108296 and 20557108305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20557108361) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 229866 + ... + 306516.

Almost surely, 2^20557108341 is an apocalyptic number.

20557108341 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20557108341 is a deficient number, since it is larger than the sum of its proper divisors (18620035467).

20557108341 is a wasteful number, since it uses less digits than its factorization.

20557108341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76724 (or 76715 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 20557108341 in words is "twenty billion, five hundred fifty-seven million, one hundred eight thousand, three hundred forty-one".