20258484479 has 8 divisors (see below), whose sum is σ = 21140723040. Its totient is φ = 19376365536.

The previous prime is 20258484461. The next prime is 20258484487. The reversal of 20258484479 is 97448485202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20258484479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20258484479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20258484079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588557 + ... + 622025.

It is an arithmetic number, because the mean of its divisors is an integer number (2642590380).

Almost surely, 2^20258484479 is an apocalyptic number.

20258484479 is a deficient number, since it is larger than the sum of its proper divisors (882238561).

20258484479 is a wasteful number, since it uses less digits than its factorization.

20258484479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59809.

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 20258484479 in words is "twenty billion, two hundred fifty-eight million, four hundred eighty-four thousand, four hundred seventy-nine".