20829790 has 8 divisors (see below), whose sum is σ = 37493640. Its totient is φ = 8331912.

The previous prime is 20829749. The next prime is 20829821. The reversal of 20829790 is 9792802.

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

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, 1041480 + ... + 1041499.

It is an arithmetic number, because the mean of its divisors is an integer number (4686705).

Almost surely, 2^20829790 is an apocalyptic number.

20829790 is a deficient number, since it is larger than the sum of its proper divisors (16663850).

20829790 is a wasteful number, since it uses less digits than its factorization.

20829790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082986.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 20829790 is about 4563.9664766516. The cubic root of 20829790 is about 275.1450034182.

The spelling of 20829790 in words is "twenty million, eight hundred twenty-nine thousand, seven hundred ninety".