20501085092 has 6 divisors (see below), whose sum is σ = 35876898918. Its totient is φ = 10250542544.

The previous prime is 20501085089. The next prime is 20501085107. The reversal of 20501085092 is 29058010502.

It can be written as a sum of positive squares in only one way, i.e., 18562972516 + 1938112576 = 136246^2 + 44024^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2562635633 + ... + 2562635640.

It is an arithmetic number, because the mean of its divisors is an integer number (5979483153).

Almost surely, 2^20501085092 is an apocalyptic number.

It is an amenable number.

20501085092 is a deficient number, since it is larger than the sum of its proper divisors (15375813826).

20501085092 is a wasteful number, since it uses less digits than its factorization.

20501085092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125271277 (or 5125271275 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 20501085092 its sum of digits (32), we get a square (20501085124 = 143182²).

Adding to 20501085092 its reverse (29058010502), we get a palindrome (49559095594).

The spelling of 20501085092 in words is "twenty billion, five hundred one million, eighty-five thousand, ninety-two".