63291992020 has 24 divisors (see below), whose sum is σ = 138692018304. Its totient is φ = 24216066336.

The previous prime is 63291992003. The next prime is 63291992021. The reversal of 63291992020 is 2029919236.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63291992021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68795184 + ... + 68796103.

It is an arithmetic number, because the mean of its divisors is an integer number (5778834096).

Almost surely, 2^63291992020 is an apocalyptic number.

It is an amenable number.

63291992020 is an abundant number, since it is smaller than the sum of its proper divisors (75400026284).

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

63291992020 is a wasteful number, since it uses less digits than its factorization.

63291992020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137591319 (or 137591317 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 63291992020 in words is "sixty-three billion, two hundred ninety-one million, nine hundred ninety-two thousand, twenty".