20601615771 has 12 divisors (see below), whose sum is σ = 32463152280. Its totient is φ = 12485827680.

The previous prime is 20601615751. The next prime is 20601615787. The reversal of 20601615771 is 17751610602.

20601615771 is a `hidden beast` number, since 20 + 6 + 0 + 1 + 61 + 577 + 1 = 666.

It is not a de Polignac number, because 20601615771 - 2¹⁴ = 20601599387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20601615751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104048466 + ... + 104048663.

It is an arithmetic number, because the mean of its divisors is an integer number (2705262690).

Almost surely, 2^20601615771 is an apocalyptic number.

20601615771 is a deficient number, since it is larger than the sum of its proper divisors (11861536509).

20601615771 is a wasteful number, since it uses less digits than its factorization.

20601615771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208097146 (or 208097143 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The spelling of 20601615771 in words is "twenty billion, six hundred one million, six hundred fifteen thousand, seven hundred seventy-one".