20386577623 has 2 divisors, whose sum is σ = 20386577624. Its totient is φ = 20386577622.

The previous prime is 20386577521. The next prime is 20386577663. The reversal of 20386577623 is 32677568302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20386577623 - 2¹⁷ = 20386446551 is a prime.

It is a super-2 number, since 2×20386577623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20386577663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10193288811 + 10193288812.

It is an arithmetic number, because the mean of its divisors is an integer number (10193288812).

Almost surely, 2^20386577623 is an apocalyptic number.

20386577623 is a deficient number, since it is larger than the sum of its proper divisors (1).

20386577623 is an equidigital number, since it uses as much as digits as its factorization.

20386577623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 20386577623 in words is "twenty billion, three hundred eighty-six million, five hundred seventy-seven thousand, six hundred twenty-three".