20846542 has 8 divisors (see below), whose sum is σ = 31516416. Its totient is φ = 10341072.

The previous prime is 20846461. The next prime is 20846549. The reversal of 20846542 is 24564802.

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 (20846549) 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, 40783 + ... + 41290.

It is an arithmetic number, because the mean of its divisors is an integer number (3939552).

Almost surely, 2^20846542 is an apocalyptic number.

20846542 is a deficient number, since it is larger than the sum of its proper divisors (10669874).

20846542 is a wasteful number, since it uses less digits than its factorization.

20846542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82202.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 20846542 is about 4565.8013535413. The cubic root of 20846542 is about 275.2187438643.

The spelling of 20846542 in words is "twenty million, eight hundred forty-six thousand, five hundred forty-two".