20020010123431 has 2 divisors, whose sum is σ = 20020010123432. Its totient is φ = 20020010123430.

The previous prime is 20020010123417. The next prime is 20020010123437. The reversal of 20020010123431 is 13432101002002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20020010123431 - 2³¹ = 20017862639783 is a prime.

It is a super-2 number, since 2×20020010123431² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20020010123399 and 20020010123408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020010123437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010005061715 + 10010005061716.

It is an arithmetic number, because the mean of its divisors is an integer number (10010005061716).

Almost surely, 2^{20020010123431} is an apocalyptic number.

20020010123431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020010123431 is an equidigital number, since it uses as much as digits as its factorization.

20020010123431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20020010123431 its reverse (13432101002002), we get a palindrome (33452111125433).

The spelling of 20020010123431 in words is "twenty trillion, twenty billion, ten million, one hundred twenty-three thousand, four hundred thirty-one".