20394029 has 8 divisors (see below), whose sum is σ = 20849400. Its totient is φ = 19941376.

The previous prime is 20393983. The next prime is 20394037. The reversal of 20394029 is 92049302.

It can be written as a sum of positive squares in 4 ways, for example, as 10876804 + 9517225 = 3298^2 + 3085^2 .

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 20394029 - 2⁸ = 20393773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20393992 and 20394010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20394079) 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, 23369 + ... + 24225.

It is an arithmetic number, because the mean of its divisors is an integer number (2606175).

Almost surely, 2^20394029 is an apocalyptic number.

It is an amenable number.

20394029 is a deficient number, since it is larger than the sum of its proper divisors (455371).

20394029 is an equidigital number, since it uses as much as digits as its factorization.

20394029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20394029 is about 4515.9748670691. The cubic root of 20394029 is about 273.2127803037.

The spelling of 20394029 in words is "twenty million, three hundred ninety-four thousand, twenty-nine".