20078923 has 8 divisors (see below), whose sum is σ = 20423936. Its totient is φ = 19737000.

The previous prime is 20078897. The next prime is 20078941. The reversal of 20078923 is 32987002.

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-20078923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20078623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14908 + ... + 16198.

It is an arithmetic number, because the mean of its divisors is an integer number (2552992).

Almost surely, 2^20078923 is an apocalyptic number.

20078923 is a deficient number, since it is larger than the sum of its proper divisors (345013).

20078923 is a wasteful number, since it uses less digits than its factorization.

20078923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20078923 is about 4480.9511267141. The cubic root of 20078923 is about 271.7983429981.

The spelling of 20078923 in words is "twenty million, seventy-eight thousand, nine hundred twenty-three".