20055100031 has 2 divisors, whose sum is σ = 20055100032. Its totient is φ = 20055100030.

The previous prime is 20055100019. The next prime is 20055100049. The reversal of 20055100031 is 13000155002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20055100031 - 2²⁶ = 19987991167 is a prime.

It is a super-2 number, since 2×20055100031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20055099982 and 20055100009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20055100061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10027550015 + 10027550016.

It is an arithmetic number, because the mean of its divisors is an integer number (10027550016).

Almost surely, 2^20055100031 is an apocalyptic number.

20055100031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20055100031 is an equidigital number, since it uses as much as digits as its factorization.

20055100031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

Adding to 20055100031 its reverse (13000155002), we get a palindrome (33055255033).

The spelling of 20055100031 in words is "twenty billion, fifty-five million, one hundred thousand, thirty-one".