20505423214 has 16 divisors (see below), whose sum is σ = 31507801200. Its totient is φ = 10005360064.

The previous prime is 20505423203. The next prime is 20505423217. The reversal of 20505423214 is 41232450502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20505423217) 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, 618049 + ... + 650380.

It is an arithmetic number, because the mean of its divisors is an integer number (1969237575).

Almost surely, 2^20505423214 is an apocalyptic number.

20505423214 is a deficient number, since it is larger than the sum of its proper divisors (11002377986).

20505423214 is a wasteful number, since it uses less digits than its factorization.

20505423214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268627.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20505423214 its reverse (41232450502), we get a palindrome (61737873716).

The spelling of 20505423214 in words is "twenty billion, five hundred five million, four hundred twenty-three thousand, two hundred fourteen".