20008112481 has 64 divisors (see below), whose sum is σ = 35999976960. Its totient is φ = 10721341440.

The previous prime is 20008112479. The next prime is 20008112491. The reversal of 20008112481 is 18421180002.

It is not a de Polignac number, because 20008112481 - 2¹ = 20008112479 is a prime.

It is a super-2 number, since 2×20008112481² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20008112441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 878761 + ... + 901241.

It is an arithmetic number, because the mean of its divisors is an integer number (562499640).

Almost surely, 2^20008112481 is an apocalyptic number.

20008112481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20008112481 is a deficient number, since it is larger than the sum of its proper divisors (15991864479).

20008112481 is a wasteful number, since it uses less digits than its factorization.

20008112481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22791 (or 22785 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

Adding to 20008112481 its reverse (18421180002), we get a palindrome (38429292483).

The spelling of 20008112481 in words is "twenty billion, eight million, one hundred twelve thousand, four hundred eighty-one".