20321886481 has 24 divisors (see below), whose sum is σ = 22227174144. Its totient is φ = 18570539520.

The previous prime is 20321886457. The next prime is 20321886499. The reversal of 20321886481 is 18468812302.

It is a happy number.

It is not a de Polignac number, because 20321886481 - 2⁷ = 20321886353 is a prime.

It is a super-2 number, since 2×20321886481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321886181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7647105 + ... + 7649761.

It is an arithmetic number, because the mean of its divisors is an integer number (926132256).

Almost surely, 2^20321886481 is an apocalyptic number.

It is an amenable number.

20321886481 is a deficient number, since it is larger than the sum of its proper divisors (1905287663).

20321886481 is a wasteful number, since it uses less digits than its factorization.

20321886481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The spelling of 20321886481 in words is "twenty billion, three hundred twenty-one million, eight hundred eighty-six thousand, four hundred eighty-one".