20523220330 has 8 divisors (see below), whose sum is σ = 36941796612. Its totient is φ = 8209288128.

The previous prime is 20523220303. The next prime is 20523220331. The reversal of 20523220330 is 3302232502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17280942849 + 3242277481 = 131457^2 + 56941^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20523220331) 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, 1026161007 + ... + 1026161026.

Almost surely, 2^20523220330 is an apocalyptic number.

20523220330 is a deficient number, since it is larger than the sum of its proper divisors (16418576282).

20523220330 is a wasteful number, since it uses less digits than its factorization.

20523220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052322040.

The product of its (nonzero) digits is 2160, while the sum is 22.

Adding to 20523220330 its reverse (3302232502), we get a palindrome (23825452832).

The spelling of 20523220330 in words is "twenty billion, five hundred twenty-three million, two hundred twenty thousand, three hundred thirty".