20531554411 has 2 divisors, whose sum is σ = 20531554412. Its totient is φ = 20531554410.

The previous prime is 20531554397. The next prime is 20531554427. The reversal of 20531554411 is 11445513502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20531554411 - 2⁷ = 20531554283 is a prime.

It is not a weakly prime, because it can be changed into another prime (20531554471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10265777205 + 10265777206.

It is an arithmetic number, because the mean of its divisors is an integer number (10265777206).

Almost surely, 2^20531554411 is an apocalyptic number.

20531554411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20531554411 is an equidigital number, since it uses as much as digits as its factorization.

20531554411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 20531554411 in words is "twenty billion, five hundred thirty-one million, five hundred fifty-four thousand, four hundred eleven".