20243625815 has 8 divisors (see below), whose sum is σ = 27762686880. Its totient is φ = 13881343392.

The previous prime is 20243625707. The next prime is 20243625817. The reversal of 20243625815 is 51852634202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20243625815 - 2¹⁸ = 20243363671 is a prime.

It is a super-2 number, since 2×20243625815² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20243625817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289194620 + ... + 289194689.

It is an arithmetic number, because the mean of its divisors is an integer number (3470335860).

Almost surely, 2^20243625815 is an apocalyptic number.

20243625815 is a deficient number, since it is larger than the sum of its proper divisors (7519061065).

20243625815 is an equidigital number, since it uses as much as digits as its factorization.

20243625815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578389321.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 20243625815 in words is "twenty billion, two hundred forty-three million, six hundred twenty-five thousand, eight hundred fifteen".