23515134402 has 32 divisors (see below), whose sum is σ = 47951164800. Its totient is φ = 7686379008.

The previous prime is 23515134397. The next prime is 23515134421. The reversal of 23515134402 is 20443151532.

It is a self number, because there is not a number n which added to its sum of digits gives 23515134402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121902 + ... + 248777.

It is an arithmetic number, because the mean of its divisors is an integer number (1498473900).

Almost surely, 2^23515134402 is an apocalyptic number.

23515134402 is an abundant number, since it is smaller than the sum of its proper divisors (24436030398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23515134402 is a wasteful number, since it uses less digits than its factorization.

23515134402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370890.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 23515134402 its reverse (20443151532), we get a palindrome (43958285934).

The spelling of 23515134402 in words is "twenty-three billion, five hundred fifteen million, one hundred thirty-four thousand, four hundred two".