20248778 has 8 divisors (see below), whose sum is σ = 33134400. Its totient is φ = 9203980.

The previous prime is 20248777. The next prime is 20248831. The reversal of 20248778 is 87784202.

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 (20248771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460178 + ... + 460221.

It is an arithmetic number, because the mean of its divisors is an integer number (4141800).

Almost surely, 2^20248778 is an apocalyptic number.

20248778 is a deficient number, since it is larger than the sum of its proper divisors (12885622).

20248778 is a wasteful number, since it uses less digits than its factorization.

20248778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920412.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 20248778 is about 4499.8642201738. The cubic root of 20248778 is about 272.5626060457.

The spelling of 20248778 in words is "twenty million, two hundred forty-eight thousand, seven hundred seventy-eight".