20078403458 has 8 divisors (see below), whose sum is σ = 30203903100. Its totient is φ = 10010435760.

The previous prime is 20078403451. The next prime is 20078403481. The reversal of 20078403458 is 85430487002.

It can be written as a sum of positive squares in 2 ways, for example, as 17746769089 + 2331634369 = 133217^2 + 48287^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20078403451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14382113 + ... + 14383508.

Almost surely, 2^20078403458 is an apocalyptic number.

20078403458 is a deficient number, since it is larger than the sum of its proper divisors (10125499642).

20078403458 is a wasteful number, since it uses less digits than its factorization.

20078403458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28765972.

The product of its (nonzero) digits is 215040, while the sum is 41.

The spelling of 20078403458 in words is "twenty billion, seventy-eight million, four hundred three thousand, four hundred fifty-eight".