20200619531 has 2 divisors, whose sum is σ = 20200619532. Its totient is φ = 20200619530.

The previous prime is 20200619513. The next prime is 20200619587. The reversal of 20200619531 is 13591600202.

Together with previous prime (20200619513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20200619531 - 2¹⁰ = 20200618507 is a prime.

It is a super-2 number, since 2×20200619531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20200619494 and 20200619503.

It is not a weakly prime, because it can be changed into another prime (20200619501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100309765 + 10100309766.

It is an arithmetic number, because the mean of its divisors is an integer number (10100309766).

Almost surely, 2^20200619531 is an apocalyptic number.

20200619531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20200619531 is an equidigital number, since it uses as much as digits as its factorization.

20200619531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 20200619531 in words is "twenty billion, two hundred million, six hundred nineteen thousand, five hundred thirty-one".