20345829 has 12 divisors (see below), whose sum is σ = 31557024. Its totient is φ = 11626104.

The previous prime is 20345807. The next prime is 20345833. The reversal of 20345829 is 92854302.

It is a happy number.

It is not a de Polignac number, because 20345829 - 2⁵ = 20345797 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20345829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345839) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69057 + ... + 69350.

It is an arithmetic number, because the mean of its divisors is an integer number (2629752).

Almost surely, 2^20345829 is an apocalyptic number.

It is an amenable number.

20345829 is a deficient number, since it is larger than the sum of its proper divisors (11211195).

20345829 is a wasteful number, since it uses less digits than its factorization.

20345829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138424 (or 138417 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 20345829 is about 4510.6350994067. The cubic root of 20345829 is about 272.9973701259.

The spelling of 20345829 in words is "twenty million, three hundred forty-five thousand, eight hundred twenty-nine".