20839854 has 16 divisors (see below), whose sum is σ = 47634048. Its totient is φ = 5954232.

The previous prime is 20839829. The next prime is 20839867. The reversal of 20839854 is 45893802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248052 + ... + 248135.

It is an arithmetic number, because the mean of its divisors is an integer number (2977128).

Almost surely, 2^20839854 is an apocalyptic number.

20839854 is an abundant number, since it is smaller than the sum of its proper divisors (26794194).

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

20839854 is a wasteful number, since it uses less digits than its factorization.

20839854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496199.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 20839854 is about 4565.0688932370. The cubic root of 20839854 is about 275.1893087692.

The spelling of 20839854 in words is "twenty million, eight hundred thirty-nine thousand, eight hundred fifty-four".