20423251314061 has 2 divisors, whose sum is σ = 20423251314062. Its totient is φ = 20423251314060.

The previous prime is 20423251314017. The next prime is 20423251314073. The reversal of 20423251314061 is 16041315232402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11964722508036 + 8458528806025 = 3459006^2 + 2908355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20423251314061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20423251354061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211625657030 + 10211625657031.

It is an arithmetic number, because the mean of its divisors is an integer number (10211625657031).

Almost surely, 2^{20423251314061} is an apocalyptic number.

It is an amenable number.

20423251314061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423251314061 is an equidigital number, since it uses as much as digits as its factorization.

20423251314061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 20423251314061 its reverse (16041315232402), we get a palindrome (36464566546463).

The spelling of 20423251314061 in words is "twenty trillion, four hundred twenty-three billion, two hundred fifty-one million, three hundred fourteen thousand, sixty-one".