20242787515 has 8 divisors (see below), whose sum is σ = 24326001648. Its totient is φ = 16171125600.

The previous prime is 20242787459. The next prime is 20242787533. The reversal of 20242787515 is 51578724202.

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

It is not a de Polignac number, because 20242787515 - 2⁹ = 20242787003 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2884197 + ... + 2891206.

It is an arithmetic number, because the mean of its divisors is an integer number (3040750206).

Almost surely, 2^20242787515 is an apocalyptic number.

20242787515 is a deficient number, since it is larger than the sum of its proper divisors (4083214133).

20242787515 is an equidigital number, since it uses as much as digits as its factorization.

20242787515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5776109.

The product of its (nonzero) digits is 313600, while the sum is 43.

The spelling of 20242787515 in words is "twenty billion, two hundred forty-two million, seven hundred eighty-seven thousand, five hundred fifteen".