20632293991 has 2 divisors, whose sum is σ = 20632293992. Its totient is φ = 20632293990.

The previous prime is 20632293943. The next prime is 20632294019. The reversal of 20632293991 is 19939223602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20632293991 - 2⁷ = 20632293863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20632593991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10316146995 + 10316146996.

It is an arithmetic number, because the mean of its divisors is an integer number (10316146996).

Almost surely, 2^20632293991 is an apocalyptic number.

20632293991 is a deficient number, since it is larger than the sum of its proper divisors (1).

20632293991 is an equidigital number, since it uses as much as digits as its factorization.

20632293991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 314928, while the sum is 46.

The spelling of 20632293991 in words is "twenty billion, six hundred thirty-two million, two hundred ninety-three thousand, nine hundred ninety-one".