20266213 has 8 divisors (see below), whose sum is σ = 22471776. Its totient is φ = 18121200.

The previous prime is 20266199. The next prime is 20266223. The reversal of 20266213 is 31266202.

It is a happy number.

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 20266213 - 2⁹ = 20265701 is a prime.

It is a super-2 number, since 2×20266213² = 821438778722738, 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 (20266223) 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, 14431 + ... + 15772.

It is an arithmetic number, because the mean of its divisors is an integer number (2808972).

Almost surely, 2^20266213 is an apocalyptic number.

It is an amenable number.

20266213 is a deficient number, since it is larger than the sum of its proper divisors (2205563).

20266213 is a wasteful number, since it uses less digits than its factorization.

20266213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30275.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20266213 is about 4501.8010840107. The cubic root of 20266213 is about 272.6408126708.

The spelling of 20266213 in words is "twenty million, two hundred sixty-six thousand, two hundred thirteen".