20029213 has 4 divisors (see below), whose sum is σ = 21207420. Its totient is φ = 18851008.

The previous prime is 20029199. The next prime is 20029241. The reversal of 20029213 is 31292002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7198489 + 12830724 = 2683^2 + 3582^2 .

It is a cyclic number.

It is not a de Polignac number, because 20029213 - 2¹³ = 20021021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20029253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589078 + ... + 589111.

It is an arithmetic number, because the mean of its divisors is an integer number (5301855).

Almost surely, 2^20029213 is an apocalyptic number.

It is an amenable number.

20029213 is a deficient number, since it is larger than the sum of its proper divisors (1178207).

20029213 is a wasteful number, since it uses less digits than its factorization.

20029213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1178206.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20029213 is about 4475.4008758993. The cubic root of 20029213 is about 271.5738578346.

The spelling of 20029213 in words is "twenty million, twenty-nine thousand, two hundred thirteen".