23138863570 has 16 divisors (see below), whose sum is σ = 41717469528. Its totient is φ = 9240542080.

The previous prime is 23138863549. The next prime is 23138863571. The reversal of 23138863570 is 7536883132.

It can be written as a sum of positive squares in 4 ways, for example, as 11933159121 + 11205704449 = 109239^2 + 105857^2 .

It is a super-2 number, since 2×23138863570² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23138863570.

It is not an unprimeable number, because it can be changed into a prime (23138863571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1868941 + ... + 1881280.

Almost surely, 2^23138863570 is an apocalyptic number.

23138863570 is a deficient number, since it is larger than the sum of its proper divisors (18578605958).

23138863570 is a wasteful number, since it uses less digits than its factorization.

23138863570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750845.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 23138863570 in words is "twenty-three billion, one hundred thirty-eight million, eight hundred sixty-three thousand, five hundred seventy".