20493105481 has 32 divisors (see below), whose sum is σ = 23485230720. Its totient is φ = 17760153600.

The previous prime is 20493105469. The next prime is 20493105499. The reversal of 20493105481 is 18450139402.

It is a cyclic number.

It is not a de Polignac number, because 20493105481 - 2⁹ = 20493104969 is a prime.

It is a super-2 number, since 2×20493105481² (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 20493105481.

It is not an unprimeable number, because it can be changed into a prime (20493105431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3718530 + ... + 3724036.

It is an arithmetic number, because the mean of its divisors is an integer number (733913460).

Almost surely, 2^20493105481 is an apocalyptic number.

It is an amenable number.

20493105481 is a deficient number, since it is larger than the sum of its proper divisors (2992125239).

20493105481 is a wasteful number, since it uses less digits than its factorization.

20493105481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5865.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 20493105481 in words is "twenty billion, four hundred ninety-three million, one hundred five thousand, four hundred eighty-one".