20123025105 has 24 divisors (see below), whose sum is σ = 33657579648. Its totient is φ = 10265655136.

The previous prime is 20123025079. The next prime is 20123025121. The reversal of 20123025105 is 50152032102.

It is not a de Polignac number, because 20123025105 - 2¹¹ = 20123023057 is a prime.

It is a super-2 number, since 2×20123025105² (a number of 21 digits) contains 22 as substring.

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, 1260057 + ... + 1275926.

It is an arithmetic number, because the mean of its divisors is an integer number (1402399152).

Almost surely, 2^20123025105 is an apocalyptic number.

It is an amenable number.

20123025105 is a deficient number, since it is larger than the sum of its proper divisors (13534554543).

20123025105 is a wasteful number, since it uses less digits than its factorization.

20123025105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536037 (or 2536014 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 20123025105 its reverse (50152032102), we get a palindrome (70275057207).

The spelling of 20123025105 in words is "twenty billion, one hundred twenty-three million, twenty-five thousand, one hundred five".