20423422432381 has 2 divisors, whose sum is σ = 20423422432382. Its totient is φ = 20423422432380.

The previous prime is 20423422432307. The next prime is 20423422432433. The reversal of 20423422432381 is 18323422432402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20209825945156 + 213596487225 = 4495534^2 + 462165^2 .

It is a cyclic number.

It is not a de Polignac number, because 20423422432381 - 2¹⁵ = 20423422399613 is a prime.

It is a super-2 number, since 2×20423422432381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423422432781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211711216190 + 10211711216191.

It is an arithmetic number, because the mean of its divisors is an integer number (10211711216191).

Almost surely, 2^{20423422432381} is an apocalyptic number.

It is an amenable number.

20423422432381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423422432381 is an equidigital number, since it uses as much as digits as its factorization.

20423422432381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 40.

Adding to 20423422432381 its reverse (18323422432402), we get a palindrome (38746844864783).

The spelling of 20423422432381 in words is "twenty trillion, four hundred twenty-three billion, four hundred twenty-two million, four hundred thirty-two thousand, three hundred eighty-one".