20023255105 has 64 divisors (see below), whose sum is σ = 28849766400. Its totient is φ = 13053519360.

The previous prime is 20023255097. The next prime is 20023255121. The reversal of 20023255105 is 50155232002.

It is a happy number.

It is not a de Polignac number, because 20023255105 - 2³ = 20023255097 is a prime.

It is a super-2 number, since 2×20023255105² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20023255105.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15533301 + ... + 15534589.

It is an arithmetic number, because the mean of its divisors is an integer number (450777600).

Almost surely, 2^20023255105 is an apocalyptic number.

It is an amenable number.

20023255105 is a deficient number, since it is larger than the sum of its proper divisors (8826511295).

20023255105 is a wasteful number, since it uses less digits than its factorization.

20023255105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574.

The product of its (nonzero) digits is 3000, while the sum is 25.

Adding to 20023255105 its reverse (50155232002), we get a palindrome (70178487107).

The spelling of 20023255105 in words is "twenty billion, twenty-three million, two hundred fifty-five thousand, one hundred five".