20939046 has 8 divisors (see below), whose sum is σ = 41878104. Its totient is φ = 6979680.

The previous prime is 20939033. The next prime is 20939057. The reversal of 20939046 is 64093902.

It is a sphenic number, since it is the product of 3 distinct primes.

20939046 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20938998 and 20939016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1744915 + ... + 1744926.

It is an arithmetic number, because the mean of its divisors is an integer number (5234763).

Almost surely, 2^20939046 is an apocalyptic number.

20939046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20939046 is a wasteful number, since it uses less digits than its factorization.

20939046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3489846.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 20939046 is about 4575.9202353188. The cubic root of 20939046 is about 275.6252264744.

The spelling of 20939046 in words is "twenty million, nine hundred thirty-nine thousand, forty-six".