20653829 has 16 divisors (see below), whose sum is σ = 24779520. Its totient is φ = 16840320.

The previous prime is 20653823. The next prime is 20653837. The reversal of 20653829 is 92835602.

It is not a de Polignac number, because 20653829 - 2⁸ = 20653573 is a prime.

It is a super-2 number, since 2×20653829² = 853161304722482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20653823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13697 + ... + 15129.

It is an arithmetic number, because the mean of its divisors is an integer number (1548720).

Almost surely, 2^20653829 is an apocalyptic number.

20653829 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20653829 is a deficient number, since it is larger than the sum of its proper divisors (4125691).

20653829 is a wasteful number, since it uses less digits than its factorization.

20653829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20653829 is about 4544.6483912400. The cubic root of 20653829 is about 274.3680430744.

The spelling of 20653829 in words is "twenty million, six hundred fifty-three thousand, eight hundred twenty-nine".