20352156361 has 4 divisors (see below), whose sum is σ = 20352630724. Its totient is φ = 20351682000.

The previous prime is 20352156347. The next prime is 20352156371. The reversal of 20352156361 is 16365125302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16365125302 = 2 ⋅8182562651.

It can be written as a sum of positive squares in 2 ways, for example, as 7177478400 + 13174677961 = 84720^2 + 114781^2 .

It is a cyclic number.

It is not a de Polignac number, because 20352156361 - 2⁵ = 20352156329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20352156311) 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, 165630 + ... + 261031.

It is an arithmetic number, because the mean of its divisors is an integer number (5088157681).

Almost surely, 2^20352156361 is an apocalyptic number.

It is an amenable number.

20352156361 is a deficient number, since it is larger than the sum of its proper divisors (474363).

20352156361 is an equidigital number, since it uses as much as digits as its factorization.

20352156361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474362.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 20352156361 in words is "twenty billion, three hundred fifty-two million, one hundred fifty-six thousand, three hundred sixty-one".