23530021777 has 2 divisors, whose sum is σ = 23530021778. Its totient is φ = 23530021776.

The previous prime is 23530021709. The next prime is 23530021789. The reversal of 23530021777 is 77712003532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23436241921 + 93779856 = 153089^2 + 9684^2 .

It is a cyclic number.

It is not a de Polignac number, because 23530021777 - 2¹⁵ = 23529989009 is a prime.

It is not a weakly prime, because it can be changed into another prime (23530021877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11765010888 + 11765010889.

It is an arithmetic number, because the mean of its divisors is an integer number (11765010889).

Almost surely, 2^23530021777 is an apocalyptic number.

It is an amenable number.

23530021777 is a deficient number, since it is larger than the sum of its proper divisors (1).

23530021777 is an equidigital number, since it uses as much as digits as its factorization.

23530021777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 37.

The spelling of 23530021777 in words is "twenty-three billion, five hundred thirty million, twenty-one thousand, seven hundred seventy-seven".