20420133031 has 2 divisors, whose sum is σ = 20420133032. Its totient is φ = 20420133030.

The previous prime is 20420133029. The next prime is 20420133043. The reversal of 20420133031 is 13033102402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20420133031 - 2¹ = 20420133029 is a prime.

It is a super-2 number, since 2×20420133031² (a number of 21 digits) contains 22 as substring.

Together with 20420133029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20420133431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210066515 + 10210066516.

It is an arithmetic number, because the mean of its divisors is an integer number (10210066516).

Almost surely, 2^20420133031 is an apocalyptic number.

20420133031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420133031 is an equidigital number, since it uses as much as digits as its factorization.

20420133031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20420133031 its reverse (13033102402), we get a palindrome (33453235433).

The spelling of 20420133031 in words is "twenty billion, four hundred twenty million, one hundred thirty-three thousand, thirty-one".