20034387 has 12 divisors (see below), whose sum is σ = 28982824. Its totient is φ = 13335840.

The previous prime is 20034373. The next prime is 20034397. The reversal of 20034387 is 78343002.

It is not a de Polignac number, because 20034387 - 2⁶ = 20034323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20034387.

It is not an unprimeable number, because it can be changed into a prime (20034307) 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 11 ways as a sum of consecutive naturals, for example, 6687 + ... + 9207.

Almost surely, 2^20034387 is an apocalyptic number.

20034387 is a deficient number, since it is larger than the sum of its proper divisors (8948437).

20034387 is a wasteful number, since it uses less digits than its factorization.

20034387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410 (or 3407 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20034387 is about 4475.9788873497. The cubic root of 20034387 is about 271.5972403837.

Adding to 20034387 its reverse (78343002), we get a palindrome (98377389).

The spelling of 20034387 in words is "twenty million, thirty-four thousand, three hundred eighty-seven".