20675257161 has 16 divisors (see below), whose sum is σ = 29859162816. Its totient is φ = 12649686336.

The previous prime is 20675257117. The next prime is 20675257193. The reversal of 20675257161 is 16175257602.

It is a happy number.

It is not a de Polignac number, because 20675257161 - 2¹⁴ = 20675240777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20675257961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525435 + ... + 1538928.

It is an arithmetic number, because the mean of its divisors is an integer number (1866197676).

Almost surely, 2^20675257161 is an apocalyptic number.

It is an amenable number.

20675257161 is a deficient number, since it is larger than the sum of its proper divisors (9183905655).

20675257161 is a wasteful number, since it uses less digits than its factorization.

20675257161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064552.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 20675257161 in words is "twenty billion, six hundred seventy-five million, two hundred fifty-seven thousand, one hundred sixty-one".