20203356630 has 128 divisors (see below), whose sum is σ = 53061765120. Its totient is φ = 4907105280.

The previous prime is 20203356559. The next prime is 20203356637. The reversal of 20203356630 is 3665330202.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203356637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1453815 + ... + 1467645.

It is an arithmetic number, because the mean of its divisors is an integer number (414545040).

Almost surely, 2^20203356630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20203356630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26530882560).

20203356630 is an abundant number, since it is smaller than the sum of its proper divisors (32858408490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20203356630 is a wasteful number, since it uses less digits than its factorization.

20203356630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13966.

The product of its (nonzero) digits is 19440, while the sum is 30.

Adding to 20203356630 its reverse (3665330202), we get a palindrome (23868686832).

The spelling of 20203356630 in words is "twenty billion, two hundred three million, three hundred fifty-six thousand, six hundred thirty".