23210019977 has 2 divisors, whose sum is σ = 23210019978. Its totient is φ = 23210019976.

The previous prime is 23210019953. The next prime is 23210020007. The reversal of 23210019977 is 77991001232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13412187721 + 9797832256 = 115811^2 + 98984^2 .

It is a cyclic number.

It is not a de Polignac number, because 23210019977 - 2²⁸ = 22941584521 is a prime.

It is a super-3 number, since 3×23210019977³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (23210010977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11605009988 + 11605009989.

It is an arithmetic number, because the mean of its divisors is an integer number (11605009989).

Almost surely, 2^23210019977 is an apocalyptic number.

It is an amenable number.

23210019977 is a deficient number, since it is larger than the sum of its proper divisors (1).

23210019977 is an equidigital number, since it uses as much as digits as its factorization.

23210019977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The spelling of 23210019977 in words is "twenty-three billion, two hundred ten million, nineteen thousand, nine hundred seventy-seven".