20511105350 has 48 divisors (see below), whose sum is σ = 39064932720. Its totient is φ = 8008089600.

The previous prime is 20511105337. The next prime is 20511105371. The reversal of 20511105350 is 5350111502.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4575110 + ... + 4579590.

It is an arithmetic number, because the mean of its divisors is an integer number (813852765).

Almost surely, 2^20511105350 is an apocalyptic number.

20511105350 is a deficient number, since it is larger than the sum of its proper divisors (18553827370).

20511105350 is a wasteful number, since it uses less digits than its factorization.

20511105350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665 (or 6660 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 20511105350 its reverse (5350111502), we get a palindrome (25861216852).

The spelling of 20511105350 in words is "twenty billion, five hundred eleven million, one hundred five thousand, three hundred fifty".