20466890351 has 2 divisors, whose sum is σ = 20466890352. Its totient is φ = 20466890350.

The previous prime is 20466890321. The next prime is 20466890387. The reversal of 20466890351 is 15309866402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20466890351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20466890321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10233445175 + 10233445176.

It is an arithmetic number, because the mean of its divisors is an integer number (10233445176).

Almost surely, 2^20466890351 is an apocalyptic number.

20466890351 is a deficient number, since it is larger than the sum of its proper divisors (1).

20466890351 is an equidigital number, since it uses as much as digits as its factorization.

20466890351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 20466890351 in words is "twenty billion, four hundred sixty-six million, eight hundred ninety thousand, three hundred fifty-one".