20430526 has 4 divisors (see below), whose sum is σ = 30645792. Its totient is φ = 10215262.

The previous prime is 20430517. The next prime is 20430539. The reversal of 20430526 is 62503402.

It is a happy number.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20430497 and 20430506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5107630 + ... + 5107633.

It is an arithmetic number, because the mean of its divisors is an integer number (7661448).

Almost surely, 2^20430526 is an apocalyptic number.

20430526 is a deficient number, since it is larger than the sum of its proper divisors (10215266).

20430526 is a wasteful number, since it uses less digits than its factorization.

20430526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10215265.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20430526 is about 4520.0139380316. The cubic root of 20430526 is about 273.3756630193.

Adding to 20430526 its reverse (62503402), we get a palindrome (82933928).

The spelling of 20430526 in words is "twenty million, four hundred thirty thousand, five hundred twenty-six".