20380621649359 has 2 divisors, whose sum is σ = 20380621649360. Its totient is φ = 20380621649358.

The previous prime is 20380621649309. The next prime is 20380621649371. The reversal of 20380621649359 is 95394612608302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20380621649359 - 2¹⁵ = 20380621616591 is a prime.

It is a super-2 number, since 2×20380621649359² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20380621649309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190310824679 + 10190310824680.

It is an arithmetic number, because the mean of its divisors is an integer number (10190310824680).

Almost surely, 2^{20380621649359} is an apocalyptic number.

20380621649359 is a deficient number, since it is larger than the sum of its proper divisors (1).

20380621649359 is an equidigital number, since it uses as much as digits as its factorization.

20380621649359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 20380621649359 in words is "twenty trillion, three hundred eighty billion, six hundred twenty-one million, six hundred forty-nine thousand, three hundred fifty-nine".