21020023310179 has 2 divisors, whose sum is σ = 21020023310180. Its totient is φ = 21020023310178.

The previous prime is 21020023310053. The next prime is 21020023310189. The reversal of 21020023310179 is 97101332002012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21020023310179 - 2¹¹ = 21020023308131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21020023310179.

It is not a weakly prime, because it can be changed into another prime (21020023310189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510011655089 + 10510011655090.

It is an arithmetic number, because the mean of its divisors is an integer number (10510011655090).

Almost surely, 2^{21020023310179} is an apocalyptic number.

21020023310179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020023310179 is an equidigital number, since it uses as much as digits as its factorization.

21020023310179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 21020023310179 in words is "twenty-one trillion, twenty billion, twenty-three million, three hundred ten thousand, one hundred seventy-nine".