20214523 has 4 divisors (see below), whose sum is σ = 23102320. Its totient is φ = 17326728.

The previous prime is 20214497. The next prime is 20214527. The reversal of 20214523 is 32541202.

20214523 = T₁₃₇₇ + T₁₃₇₈ + ... + T₁₃₉₇.

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

It is a cyclic number.

It is not a de Polignac number, because 20214523 - 2¹³ = 20206331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20214523.

It is not an unprimeable number, because it can be changed into a prime (20214527) 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, 1443888 + ... + 1443901.

It is an arithmetic number, because the mean of its divisors is an integer number (5775580).

Almost surely, 2^20214523 is an apocalyptic number.

20214523 is a deficient number, since it is larger than the sum of its proper divisors (2887797).

20214523 is an equidigital number, since it uses as much as digits as its factorization.

20214523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2887796.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20214523 is about 4496.0563830984. The cubic root of 20214523 is about 272.4088206013.

Adding to 20214523 its reverse (32541202), we get a palindrome (52755725).

The spelling of 20214523 in words is "twenty million, two hundred fourteen thousand, five hundred twenty-three".