20910292031 has 2 divisors, whose sum is σ = 20910292032. Its totient is φ = 20910292030.

The previous prime is 20910292027. The next prime is 20910292087. The reversal of 20910292031 is 13029201902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20910292031 - 2² = 20910292027 is a prime.

It is a super-2 number, since 2×20910292031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20910291985 and 20910292003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20913292031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10455146015 + 10455146016.

It is an arithmetic number, because the mean of its divisors is an integer number (10455146016).

Almost surely, 2^20910292031 is an apocalyptic number.

20910292031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20910292031 is an equidigital number, since it uses as much as digits as its factorization.

20910292031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

Adding to 20910292031 its reverse (13029201902), we get a palindrome (33939493933).

The spelling of 20910292031 in words is "twenty billion, nine hundred ten million, two hundred ninety-two thousand, thirty-one".