20380531459501 has 2 divisors, whose sum is σ = 20380531459502. Its totient is φ = 20380531459500.

The previous prime is 20380531459403. The next prime is 20380531459523. The reversal of 20380531459501 is 10595413508302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18015364291401 + 2365167168100 = 4244451^2 + 1537910^2 .

It is a cyclic number.

It is not a de Polignac number, because 20380531459501 - 2²⁵ = 20380497905069 is a prime.

It is a super-2 number, since 2×20380531459501² (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 (20380531409501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190265729750 + 10190265729751.

It is an arithmetic number, because the mean of its divisors is an integer number (10190265729751).

Almost surely, 2^{20380531459501} is an apocalyptic number.

It is an amenable number.

20380531459501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20380531459501 is an equidigital number, since it uses as much as digits as its factorization.

20380531459501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 20380531459501 in words is "twenty trillion, three hundred eighty billion, five hundred thirty-one million, four hundred fifty-nine thousand, five hundred one".