20087694 has 72 divisors (see below), whose sum is σ = 50044176. Its totient is φ = 5808000.

The previous prime is 20087653. The next prime is 20087701. The reversal of 20087694 is 49678002.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 49894 + ... + 50294.

It is an arithmetic number, because the mean of its divisors is an integer number (695058).

Almost surely, 2^20087694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20087694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25022088).

20087694 is an abundant number, since it is smaller than the sum of its proper divisors (29956482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20087694 is a wasteful number, since it uses less digits than its factorization.

20087694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 20087694 is about 4481.9297183245. The cubic root of 20087694 is about 271.8379134510.

The spelling of 20087694 in words is "twenty million, eighty-seven thousand, six hundred ninety-four".