20839672 has 16 divisors (see below), whose sum is σ = 44656560. Its totient is φ = 8931264.

The previous prime is 20839667. The next prime is 20839691. The reversal of 20839672 is 27693802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186013 + ... + 186124.

It is an arithmetic number, because the mean of its divisors is an integer number (2791035).

Almost surely, 2^20839672 is an apocalyptic number.

It is an amenable number.

20839672 is an abundant number, since it is smaller than the sum of its proper divisors (23816888).

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

20839672 is a wasteful number, since it uses less digits than its factorization.

20839672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372150 (or 372146 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20839672 is about 4565.0489592117. The cubic root of 20839672 is about 275.1885076664.

The spelling of 20839672 in words is "twenty million, eight hundred thirty-nine thousand, six hundred seventy-two".