20963060280 has 128 divisors (see below), whose sum is σ = 69987859200. Its totient is φ = 5581270656.

The previous prime is 20963060233. The next prime is 20963060303. The reversal of 20963060280 is 8206036902.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 679347 + ... + 709533.

It is an arithmetic number, because the mean of its divisors is an integer number (546780150).

Almost surely, 2^20963060280 is an apocalyptic number.

20963060280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20963060280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34993929600).

20963060280 is an abundant number, since it is smaller than the sum of its proper divisors (49024798920).

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

20963060280 is a wasteful number, since it uses less digits than its factorization.

20963060280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30850 (or 30840 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 20963060280 in words is "twenty billion, nine hundred sixty-three million, sixty thousand, two hundred eighty".