23689881505 has 16 divisors (see below), whose sum is σ = 28638568080. Its totient is φ = 18811683072.

The previous prime is 23689881469. The next prime is 23689881517. The reversal of 23689881505 is 50518898632.

It can be written as a sum of positive squares in 8 ways, for example, as 956479329 + 22733402176 = 30927^2 + 150776^2 .

It is a cyclic number.

It is not a de Polignac number, because 23689881505 - 2⁷ = 23689881377 is a prime.

It is a super-2 number, since 2×23689881505² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767511 + ... + 797779.

It is an arithmetic number, because the mean of its divisors is an integer number (1789910505).

Almost surely, 2^23689881505 is an apocalyptic number.

It is an amenable number.

23689881505 is a deficient number, since it is larger than the sum of its proper divisors (4948686575).

23689881505 is a wasteful number, since it uses less digits than its factorization.

23689881505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31428.

The product of its (nonzero) digits is 4147200, while the sum is 55.

The spelling of 23689881505 in words is "twenty-three billion, six hundred eighty-nine million, eight hundred eighty-one thousand, five hundred five".