20367235121 has 2 divisors, whose sum is σ = 20367235122. Its totient is φ = 20367235120.

The previous prime is 20367235111. The next prime is 20367235129. The reversal of 20367235121 is 12153276302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20004142096 + 363093025 = 141436^2 + 19055^2 .

It is a cyclic number.

It is not a de Polignac number, because 20367235121 - 2¹⁴ = 20367218737 is a prime.

It is not a weakly prime, because it can be changed into another prime (20367235129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10183617560 + 10183617561.

It is an arithmetic number, because the mean of its divisors is an integer number (10183617561).

Almost surely, 2^20367235121 is an apocalyptic number.

It is an amenable number.

20367235121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20367235121 is an equidigital number, since it uses as much as digits as its factorization.

20367235121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The spelling of 20367235121 in words is "twenty billion, three hundred sixty-seven million, two hundred thirty-five thousand, one hundred twenty-one".