20039988 has 12 divisors (see below), whose sum is σ = 46760000. Its totient is φ = 6679992.

The previous prime is 20039983. The next prime is 20039993. The reversal of 20039988 is 88993002.

It is an interprime number because it is at equal distance from previous prime (20039983) and next prime (20039993).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20039988² = 803202238080288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20039983) 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 3 ways as a sum of consecutive naturals, for example, 834988 + ... + 835011.

Almost surely, 2^20039988 is an apocalyptic number.

It is an amenable number.

20039988 is an abundant number, since it is smaller than the sum of its proper divisors (26720012).

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

20039988 is a wasteful number, since it uses less digits than its factorization.

20039988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670006 (or 1670004 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20039988 is about 4476.6045168185. The cubic root of 20039988 is about 271.6225481109.

The spelling of 20039988 in words is "twenty million, thirty-nine thousand, nine hundred eighty-eight".