20620123087579 has 2 divisors, whose sum is σ = 20620123087580. Its totient is φ = 20620123087578.

The previous prime is 20620123087513. The next prime is 20620123087709. The reversal of 20620123087579 is 97578032102602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20620123087579 - 2¹¹ = 20620123085531 is a prime.

It is a super-2 number, since 2×20620123087579² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20620123082579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310061543789 + 10310061543790.

It is an arithmetic number, because the mean of its divisors is an integer number (10310061543790).

Almost surely, 2^{20620123087579} is an apocalyptic number.

20620123087579 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620123087579 is an equidigital number, since it uses as much as digits as its factorization.

20620123087579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 20620123087579 in words is "twenty trillion, six hundred twenty billion, one hundred twenty-three million, eighty-seven thousand, five hundred seventy-nine".