20270436182021 has 2 divisors, whose sum is σ = 20270436182022. Its totient is φ = 20270436182020.

The previous prime is 20270436181987. The next prime is 20270436182027. The reversal of 20270436182021 is 12028163407202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17631273479521 + 2639162702500 = 4198961^2 + 1624550^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20270436182021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20270436182027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10135218091010 + 10135218091011.

It is an arithmetic number, because the mean of its divisors is an integer number (10135218091011).

Almost surely, 2^{20270436182021} is an apocalyptic number.

It is an amenable number.

20270436182021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20270436182021 is an equidigital number, since it uses as much as digits as its factorization.

20270436182021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

Adding to 20270436182021 its reverse (12028163407202), we get a palindrome (32298599589223).

The spelling of 20270436182021 in words is "twenty trillion, two hundred seventy billion, four hundred thirty-six million, one hundred eighty-two thousand, twenty-one".