20829765 has 16 divisors (see below), whose sum is σ = 36357696. Its totient is φ = 10099200.

The previous prime is 20829749. The next prime is 20829821. The reversal of 20829765 is 56792802.

It is a happy number.

It is not a de Polignac number, because 20829765 - 2⁴ = 20829749 is a prime.

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, 62956 + ... + 63285.

It is an arithmetic number, because the mean of its divisors is an integer number (2272356).

Almost surely, 2^20829765 is an apocalyptic number.

It is an amenable number.

20829765 is a deficient number, since it is larger than the sum of its proper divisors (15527931).

20829765 is a wasteful number, since it uses less digits than its factorization.

20829765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126260.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 20829765 is about 4563.9637378051. The cubic root of 20829765 is about 275.1448933415.

The spelling of 20829765 in words is "twenty million, eight hundred twenty-nine thousand, seven hundred sixty-five".