23051220204555 has 16 divisors (see below), whose sum is σ = 40979947030560. Its totient is φ = 12293984109024.

The previous prime is 23051220204527. The next prime is 23051220204557. The reversal of 23051220204555 is 55540202215032.

23051220204555 is a `hidden beast` number, since 2 + 30 + 51 + 2 + 2 + 0 + 20 + 4 + 555 = 666.

It is not a de Polignac number, because 23051220204555 - 2¹⁶ = 23051220139019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23051220204557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85374889512 + ... + 85374889781.

It is an arithmetic number, because the mean of its divisors is an integer number (2561246689410).

Almost surely, 2^{23051220204555} is an apocalyptic number.

23051220204555 is a deficient number, since it is larger than the sum of its proper divisors (17928726826005).

23051220204555 is a wasteful number, since it uses less digits than its factorization.

23051220204555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170749779307 (or 170749779301 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

Adding to 23051220204555 its reverse (55540202215032), we get a palindrome (78591422419587).

The spelling of 23051220204555 in words is "twenty-three trillion, fifty-one billion, two hundred twenty million, two hundred four thousand, five hundred fifty-five".