20403211634411 has 2 divisors, whose sum is σ = 20403211634412. Its totient is φ = 20403211634410.

The previous prime is 20403211634383. The next prime is 20403211634413. The reversal of 20403211634411 is 11443611230402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20403211634411 - 2²² = 20403207440107 is a prime.

Together with 20403211634413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20403211634413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201605817205 + 10201605817206.

It is an arithmetic number, because the mean of its divisors is an integer number (10201605817206).

Almost surely, 2^{20403211634411} is an apocalyptic number.

20403211634411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20403211634411 is an equidigital number, since it uses as much as digits as its factorization.

20403211634411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 20403211634411 its reverse (11443611230402), we get a palindrome (31846822864813).

The spelling of 20403211634411 in words is "twenty trillion, four hundred three billion, two hundred eleven million, six hundred thirty-four thousand, four hundred eleven".