20511105352 has 16 divisors (see below), whose sum is σ = 38459912940. Its totient is φ = 10255128576.

The previous prime is 20511105337. The next prime is 20511105371. The reversal of 20511105352 is 25350111502.

It can be written as a sum of positive squares in 2 ways, for example, as 18690717796 + 1820387556 = 136714^2 + 42666^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264148 + ... + 332860.

Almost surely, 2^20511105352 is an apocalyptic number.

It is an amenable number.

20511105352 is a deficient number, since it is larger than the sum of its proper divisors (17948807588).

20511105352 is a wasteful number, since it uses less digits than its factorization.

20511105352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106032 (or 106028 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 20511105352 its reverse (25350111502), we get a palindrome (45861216854).

The spelling of 20511105352 in words is "twenty billion, five hundred eleven million, one hundred five thousand, three hundred fifty-two".