20448121715 has 16 divisors (see below), whose sum is σ = 28047900672. Its totient is φ = 14019188064.

The previous prime is 20448121711. The next prime is 20448121717. The reversal of 20448121715 is 51712184402.

It is not a de Polignac number, because 20448121715 - 2² = 20448121711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20448121711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173582 + ... + 266508.

It is an arithmetic number, because the mean of its divisors is an integer number (1752993792).

Almost surely, 2^20448121715 is an apocalyptic number.

20448121715 is a deficient number, since it is larger than the sum of its proper divisors (7599778957).

20448121715 is an equidigital number, since it uses as much as digits as its factorization.

20448121715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99226.

The product of its (nonzero) digits is 17920, while the sum is 35.

The spelling of 20448121715 in words is "twenty billion, four hundred forty-eight million, one hundred twenty-one thousand, seven hundred fifteen".