20411729 has 8 divisors (see below), whose sum is σ = 22038912. Its totient is φ = 18792720.

The previous prime is 20411723. The next prime is 20411773. The reversal of 20411729 is 92711402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20411729 - 2⁸ = 20411473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20411698 and 20411707.

It is not an unprimeable number, because it can be changed into a prime (20411723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3782 + ... + 7424.

It is an arithmetic number, because the mean of its divisors is an integer number (2754864).

Almost surely, 2^20411729 is an apocalyptic number.

It is an amenable number.

20411729 is a deficient number, since it is larger than the sum of its proper divisors (1627183).

20411729 is a wasteful number, since it uses less digits than its factorization.

20411729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20411729 is about 4517.9341517999. The cubic root of 20411729 is about 273.2917980049.

The spelling of 20411729 in words is "twenty million, four hundred eleven thousand, seven hundred twenty-nine".