20018639414 has 16 divisors (see below), whose sum is σ = 30304670208. Its totient is φ = 9917292672.

The previous prime is 20018639411. The next prime is 20018639447. The reversal of 20018639414 is 41493681002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018639411) 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, 140222 + ... + 244334.

It is an arithmetic number, because the mean of its divisors is an integer number (1894041888).

Almost surely, 2^20018639414 is an apocalyptic number.

20018639414 is a deficient number, since it is larger than the sum of its proper divisors (10286030794).

20018639414 is a wasteful number, since it uses less digits than its factorization.

20018639414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104999.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 20018639414 in words is "twenty billion, eighteen million, six hundred thirty-nine thousand, four hundred fourteen".