20829699 has 12 divisors (see below), whose sum is σ = 32822712. Its totient is φ = 12624000.

The previous prime is 20829637. The next prime is 20829701. The reversal of 20829699 is 99692802.

It is not a de Polignac number, because 20829699 - 2⁸ = 20829443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20829899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 105102 + ... + 105299.

It is an arithmetic number, because the mean of its divisors is an integer number (2735226).

Almost surely, 2^20829699 is an apocalyptic number.

20829699 is a deficient number, since it is larger than the sum of its proper divisors (11993013).

20829699 is a wasteful number, since it uses less digits than its factorization.

20829699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210418 (or 210415 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 20829699 is about 4563.9565072424. The cubic root of 20829699 is about 275.1446027384.

It can be divided in two parts, 20829 and 699, that added together give a triangular number (21528 = T₂₀₇).

The spelling of 20829699 in words is "twenty million, eight hundred twenty-nine thousand, six hundred ninety-nine".