20829836 has 24 divisors (see below), whose sum is σ = 37630656. Its totient is φ = 10083200.

The previous prime is 20829821. The next prime is 20829839. The reversal of 20829836 is 63892802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20829836.

It is not an unprimeable number, because it can be changed into a prime (20829839) 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, 18440 + ... + 19536.

It is an arithmetic number, because the mean of its divisors is an integer number (1567944).

Almost surely, 2^20829836 is an apocalyptic number.

It is an amenable number.

20829836 is a deficient number, since it is larger than the sum of its proper divisors (16800820).

20829836 is a wasteful number, since it uses less digits than its factorization.

20829836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 20829836 is about 4563.9715161250. The cubic root of 20829836 is about 275.1452059592.

The spelling of 20829836 in words is "twenty million, eight hundred twenty-nine thousand, eight hundred thirty-six".