20829966 has 32 divisors (see below), whose sum is σ = 44471040. Its totient is φ = 6485184.

The previous prime is 20829959. The next prime is 20829971. The reversal of 20829966 is 66992802.

It is a super-2 number, since 2×20829966² = 867774967122312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7071 + ... + 9573.

It is an arithmetic number, because the mean of its divisors is an integer number (1389720).

Almost surely, 2^20829966 is an apocalyptic number.

20829966 is an abundant number, since it is smaller than the sum of its proper divisors (23641074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20829966 is a wasteful number, since it uses less digits than its factorization.

20829966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 20829966 is about 4563.9857580847. The cubic root of 20829966 is about 275.1457783562.

The spelling of 20829966 in words is "twenty million, eight hundred twenty-nine thousand, nine hundred sixty-six".