20742946 has 32 divisors (see below), whose sum is σ = 38736000. Its totient is φ = 8128512.

The previous prime is 20742929. The next prime is 20742949. The reversal of 20742946 is 64924702.

It is not an unprimeable number, because it can be changed into a prime (20742949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6370 + ... + 9058.

It is an arithmetic number, because the mean of its divisors is an integer number (1210500).

Almost surely, 2^20742946 is an apocalyptic number.

20742946 is a deficient number, since it is larger than the sum of its proper divisors (17993054).

20742946 is a wasteful number, since it uses less digits than its factorization.

20742946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20742946 is about 4554.4424466668. The cubic root of 20742946 is about 274.7620906568.

The spelling of 20742946 in words is "twenty million, seven hundred forty-two thousand, nine hundred forty-six".