20531203330 has 32 divisors (see below), whose sum is σ = 40731465600. Its totient is φ = 7388920320.

The previous prime is 20531203321. The next prime is 20531203397. The reversal of 20531203330 is 3330213502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951430 + ... + 972769.

It is an arithmetic number, because the mean of its divisors is an integer number (1272858300).

Almost surely, 2^20531203330 is an apocalyptic number.

20531203330 is a deficient number, since it is larger than the sum of its proper divisors (20200262270).

20531203330 is a wasteful number, since it uses less digits than its factorization.

20531203330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924314.

The product of its (nonzero) digits is 1620, while the sum is 22.

Adding to 20531203330 its reverse (3330213502), we get a palindrome (23861416832).

The spelling of 20531203330 in words is "twenty billion, five hundred thirty-one million, two hundred three thousand, three hundred thirty".