20501085124 has 27 divisors (see below), whose sum is σ = 38856005517. Its totient is φ = 9460321104.

The previous prime is 20501085113. The next prime is 20501085169. The reversal of 20501085124 is 42158010502.

The square root of 20501085124 is 143182.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3032704900 + 17468380224 = 55070^2 + 132168^2 .

It is a super-2 number, since 2×20501085124² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20501085092 and 20501085101.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3719979 + ... + 3725485.

Almost surely, 2^20501085124 is an apocalyptic number.

20501085124 is the 143182-nd square number.

It is an amenable number.

20501085124 is a deficient number, since it is larger than the sum of its proper divisors (18354920393).

20501085124 is an frugal number, since it uses more digits than its factorization.

20501085124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11044 (or 5522 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

Adding to 20501085124 its reverse (42158010502), we get a palindrome (62659095626).

The spelling of 20501085124 in words is "twenty billion, five hundred one million, eighty-five thousand, one hundred twenty-four".