20939000 has 32 divisors (see below), whose sum is σ = 48999600. Its totient is φ = 8375200.

The previous prime is 20938999. The next prime is 20939027. The reversal of 20939000 is 93902.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9470 + ... + 11469.

Almost surely, 2^20939000 is an apocalyptic number.

20939000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20939000 is an abundant number, since it is smaller than the sum of its proper divisors (28060600).

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

20939000 is a wasteful number, since it uses less digits than its factorization.

20939000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20960 (or 20946 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 20939000 is about 4575.9152090046. The cubic root of 20939000 is about 275.6250246382.

The spelling of 20939000 in words is "twenty million, nine hundred thirty-nine thousand".