20909342 has 8 divisors (see below), whose sum is σ = 31408032. Its totient is φ = 10440000.

The previous prime is 20909321. The next prime is 20909347. The reversal of 20909342 is 24390902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20909347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5459 + ... + 8462.

It is an arithmetic number, because the mean of its divisors is an integer number (3926004).

Almost surely, 2^20909342 is an apocalyptic number.

20909342 is a deficient number, since it is larger than the sum of its proper divisors (10498690).

20909342 is a wasteful number, since it uses less digits than its factorization.

20909342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14674.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20909342 is about 4572.6733974777. The cubic root of 20909342 is about 275.4948313869.

The spelling of 20909342 in words is "twenty million, nine hundred nine thousand, three hundred forty-two".