20802648915 has 24 divisors (see below), whose sum is σ = 36212698080. Its totient is φ = 11047123584.

The previous prime is 20802648913. The next prime is 20802648929. The reversal of 20802648915 is 51984620802.

It is not a de Polignac number, because 20802648915 - 2¹ = 20802648913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20802648913) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 981535 + ... + 1002504.

It is an arithmetic number, because the mean of its divisors is an integer number (1508862420).

Almost surely, 2^20802648915 is an apocalyptic number.

20802648915 is a deficient number, since it is larger than the sum of its proper divisors (15410049165).

20802648915 is a wasteful number, since it uses less digits than its factorization.

20802648915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984283 (or 1984280 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 20802648915 in words is "twenty billion, eight hundred two million, six hundred forty-eight thousand, nine hundred fifteen".