23902171253539 has 4 divisors (see below), whose sum is σ = 23902208781624. Its totient is φ = 23902133725456.

The previous prime is 23902171253537. The next prime is 23902171253561. The reversal of 23902171253539 is 93535217120932.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23902171253539 - 2¹ = 23902171253537 is a prime.

It is a super-2 number, since 2×23902171253539² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23902171253533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17791882 + ... + 19088095.

It is an arithmetic number, because the mean of its divisors is an integer number (5975552195406).

Almost surely, 2^{23902171253539} is an apocalyptic number.

23902171253539 is a deficient number, since it is larger than the sum of its proper divisors (37528085).

23902171253539 is an equidigital number, since it uses as much as digits as its factorization.

23902171253539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37528084.

The product of its (nonzero) digits is 3061800, while the sum is 52.

The spelling of 23902171253539 in words is "twenty-three trillion, nine hundred two billion, one hundred seventy-one million, two hundred fifty-three thousand, five hundred thirty-nine".