20350149821 has 2 divisors, whose sum is σ = 20350149822. Its totient is φ = 20350149820.

The previous prime is 20350149811. The next prime is 20350149881. The reversal of 20350149821 is 12894105302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20224821796 + 125328025 = 142214^2 + 11195^2 .

It is a cyclic number.

It is not a de Polignac number, because 20350149821 - 2¹⁴ = 20350133437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20350149811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10175074910 + 10175074911.

It is an arithmetic number, because the mean of its divisors is an integer number (10175074911).

Almost surely, 2^20350149821 is an apocalyptic number.

It is an amenable number.

20350149821 is a deficient number, since it is larger than the sum of its proper divisors (1).

20350149821 is an equidigital number, since it uses as much as digits as its factorization.

20350149821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 20350149821 in words is "twenty billion, three hundred fifty million, one hundred forty-nine thousand, eight hundred twenty-one".