20242557617615 has 4 divisors (see below), whose sum is σ = 24291069141144. Its totient is φ = 16194046094088.

The previous prime is 20242557617591. The next prime is 20242557617671. The reversal of 20242557617615 is 51671675524202.

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 20242557617615 - 2⁶ = 20242557617551 is a prime.

It is a super-2 number, since 2×20242557617615² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2024255761757 + ... + 2024255761766.

It is an arithmetic number, because the mean of its divisors is an integer number (6072767285286).

Almost surely, 2^{20242557617615} is an apocalyptic number.

20242557617615 is a deficient number, since it is larger than the sum of its proper divisors (4048511523529).

20242557617615 is an equidigital number, since it uses as much as digits as its factorization.

20242557617615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048511523528.

The product of its (nonzero) digits is 7056000, while the sum is 53.

The spelling of 20242557617615 in words is "twenty trillion, two hundred forty-two billion, five hundred fifty-seven million, six hundred seventeen thousand, six hundred fifteen".