63465320020 has 24 divisors (see below), whose sum is σ = 139071832704. Its totient is φ = 24282383136.

The previous prime is 63465319993. The next prime is 63465320021. The reversal of 63465320020 is 2002356436.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63465320021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68983584 + ... + 68984503.

It is an arithmetic number, because the mean of its divisors is an integer number (5794659696).

Almost surely, 2^63465320020 is an apocalyptic number.

It is an amenable number.

63465320020 is an abundant number, since it is smaller than the sum of its proper divisors (75606512684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63465320020 is a wasteful number, since it uses less digits than its factorization.

63465320020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137968119 (or 137968117 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 63465320020 its reverse (2002356436), we get a palindrome (65467676456).

The spelling of 63465320020 in words is "sixty-three billion, four hundred sixty-five million, three hundred twenty thousand, twenty".