20165033530 has 16 divisors (see below), whose sum is σ = 36306159624. Its totient is φ = 8063991360.

The previous prime is 20165033479. The next prime is 20165033557. The reversal of 20165033530 is 3533056102.

It can be written as a sum of positive squares in 4 ways, for example, as 6931062009 + 13233971521 = 83253^2 + 115039^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210537 + ... + 290956.

Almost surely, 2^20165033530 is an apocalyptic number.

20165033530 is a deficient number, since it is larger than the sum of its proper divisors (16141126094).

20165033530 is a wasteful number, since it uses less digits than its factorization.

20165033530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505521.

The product of its (nonzero) digits is 8100, while the sum is 28.

Adding to 20165033530 its reverse (3533056102), we get a palindrome (23698089632).

The spelling of 20165033530 in words is "twenty billion, one hundred sixty-five million, thirty-three thousand, five hundred thirty".