20826448478 has 64 divisors (see below), whose sum is σ = 35587641600. Its totient is φ = 9058310400.

The previous prime is 20826448403. The next prime is 20826448507. The reversal of 20826448478 is 87484462802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11154101 + ... + 11155967.

It is an arithmetic number, because the mean of its divisors is an integer number (556056900).

Almost surely, 2^20826448478 is an apocalyptic number.

20826448478 is a deficient number, since it is larger than the sum of its proper divisors (14761193122).

20826448478 is a wasteful number, since it uses less digits than its factorization.

20826448478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153.

The product of its (nonzero) digits is 5505024, while the sum is 53.

The spelling of 20826448478 in words is "twenty billion, eight hundred twenty-six million, four hundred forty-eight thousand, four hundred seventy-eight".