20946918 has 16 divisors (see below), whose sum is σ = 41990256. Its totient is φ = 6966240.

The previous prime is 20946901. The next prime is 20946931. The reversal of 20946918 is 81964902.

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, 1021 + ... + 6552.

It is an arithmetic number, because the mean of its divisors is an integer number (2624391).

Almost surely, 2^20946918 is an apocalyptic number.

20946918 is an abundant number, since it is smaller than the sum of its proper divisors (21043338).

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

20946918 is a wasteful number, since it uses less digits than its factorization.

20946918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8039.

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

The square root of 20946918 is about 4576.7803093441. The cubic root of 20946918 is about 275.6597624308.

The spelling of 20946918 in words is "twenty million, nine hundred forty-six thousand, nine hundred eighteen".