20266534 has 8 divisors (see below), whose sum is σ = 31448160. Its totient is φ = 9783816.

The previous prime is 20266531. The next prime is 20266537. The reversal of 20266534 is 43566202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20266531) and next prime (20266537).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20266531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174654 + ... + 174769.

It is an arithmetic number, because the mean of its divisors is an integer number (3931020).

Almost surely, 2^20266534 is an apocalyptic number.

20266534 is a deficient number, since it is larger than the sum of its proper divisors (11181626).

20266534 is a wasteful number, since it uses less digits than its factorization.

20266534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349454.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 20266534 is about 4501.8367362667. The cubic root of 20266534 is about 272.6422521312.

The spelling of 20266534 in words is "twenty million, two hundred sixty-six thousand, five hundred thirty-four".