23505533513 has 16 divisors (see below), whose sum is σ = 29454378624. Its totient is φ = 18223013760.

The previous prime is 23505533509. The next prime is 23505533539. The reversal of 23505533513 is 31533550532.

It is not a de Polignac number, because 23505533513 - 2² = 23505533509 is a prime.

It is a super-2 number, since 2×23505533513² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23505530513) 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, 759620 + ... + 789957.

It is an arithmetic number, because the mean of its divisors is an integer number (1840898664).

Almost surely, 2^23505533513 is an apocalyptic number.

It is an amenable number.

23505533513 is a deficient number, since it is larger than the sum of its proper divisors (5948845111).

23505533513 is a wasteful number, since it uses less digits than its factorization.

23505533513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1549792.

The product of its (nonzero) digits is 101250, while the sum is 35.

The spelling of 23505533513 in words is "twenty-three billion, five hundred five million, five hundred thirty-three thousand, five hundred thirteen".