21038736782315 has 8 divisors (see below), whose sum is σ = 28853124730080. Its totient is φ = 14426562364992.

The previous prime is 21038736782303. The next prime is 21038736782339. The reversal of 21038736782315 is 51328763783012.

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

It is a cyclic number.

It is not a de Polignac number, because 21038736782315 - 2²² = 21038732588011 is a prime.

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, 300553382570 + ... + 300553382639.

It is an arithmetic number, because the mean of its divisors is an integer number (3606640591260).

Almost surely, 2^{21038736782315} is an apocalyptic number.

21038736782315 is a deficient number, since it is larger than the sum of its proper divisors (7814387947765).

21038736782315 is an equidigital number, since it uses as much as digits as its factorization.

21038736782315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601106765221.

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 21038736782315 in words is "twenty-one trillion, thirty-eight billion, seven hundred thirty-six million, seven hundred eighty-two thousand, three hundred fifteen".