20829799 has 8 divisors (see below), whose sum is σ = 21565440. Its totient is φ = 20098200.

The previous prime is 20829749. The next prime is 20829821. The reversal of 20829799 is 99792802.

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

It is a cyclic number.

It is not a de Polignac number, because 20829799 - 2¹³ = 20821607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20829749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12582 + ... + 14140.

It is an arithmetic number, because the mean of its divisors is an integer number (2695680).

Almost surely, 2^20829799 is an apocalyptic number.

20829799 is a deficient number, since it is larger than the sum of its proper divisors (735641).

20829799 is a wasteful number, since it uses less digits than its factorization.

20829799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 20829799 is about 4563.9674626360. The cubic root of 20829799 is about 275.1450430458.

It can be divided in two parts, 2082 and 9799, that added together give a square (11881 = 109²).

The spelling of 20829799 in words is "twenty million, eight hundred twenty-nine thousand, seven hundred ninety-nine".