20900041031 has 2 divisors, whose sum is σ = 20900041032. Its totient is φ = 20900041030.

The previous prime is 20900041027. The next prime is 20900041039. The reversal of 20900041031 is 13014000902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20900041031 - 2² = 20900041027 is a prime.

It is a super-2 number, since 2×20900041031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20900040994 and 20900041012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20900041039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10450020515 + 10450020516.

It is an arithmetic number, because the mean of its divisors is an integer number (10450020516).

Almost surely, 2^20900041031 is an apocalyptic number.

20900041031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20900041031 is an equidigital number, since it uses as much as digits as its factorization.

20900041031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20900041031 its reverse (13014000902), we get a palindrome (33914041933).

The spelling of 20900041031 in words is "twenty billion, nine hundred million, forty-one thousand, thirty-one".