20601773541 has 6 divisors (see below), whose sum is σ = 29758117350. Its totient is φ = 13734515688.

The previous prime is 20601773539. The next prime is 20601773579. The reversal of 20601773541 is 14537710602.

It is a happy number.

20601773541 is a `hidden beast` number, since 2 + 0 + 601 + 7 + 7 + 3 + 5 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19368288900 + 1233484641 = 139170^2 + 35121^2 .

It is not a de Polignac number, because 20601773541 - 2¹ = 20601773539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20601773496 and 20601773505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601773501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1144542966 + ... + 1144542983.

It is an arithmetic number, because the mean of its divisors is an integer number (4959686225).

Almost surely, 2^20601773541 is an apocalyptic number.

It is an amenable number.

20601773541 is a deficient number, since it is larger than the sum of its proper divisors (9156343809).

20601773541 is a wasteful number, since it uses less digits than its factorization.

20601773541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289085955 (or 2289085952 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The spelling of 20601773541 in words is "twenty billion, six hundred one million, seven hundred seventy-three thousand, five hundred forty-one".