20479698794 has 8 divisors (see below), whose sum is σ = 30721179648. Its totient is φ = 10239305580.

The previous prime is 20479698793. The next prime is 20479698859. The reversal of 20479698794 is 49789697402.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20479698794.

It is not an unprimeable number, because it can be changed into a prime (20479698791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223082 + ... + 301205.

It is an arithmetic number, because the mean of its divisors is an integer number (3840147456).

Almost surely, 2^20479698794 is an apocalyptic number.

20479698794 is a deficient number, since it is larger than the sum of its proper divisors (10241480854).

20479698794 is a wasteful number, since it uses less digits than its factorization.

20479698794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543820.

The product of its (nonzero) digits is 54867456, while the sum is 65.

The spelling of 20479698794 in words is "twenty billion, four hundred seventy-nine million, six hundred ninety-eight thousand, seven hundred ninety-four".