20961093228 has 48 divisors (see below), whose sum is σ = 51815199744. Its totient is φ = 6572350720.

The previous prime is 20961093187. The next prime is 20961093239. The reversal of 20961093228 is 82239016902.

It is a self number, because there is not a number n which added to its sum of digits gives 20961093228.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 348973 + ... + 404603.

It is an arithmetic number, because the mean of its divisors is an integer number (1079483328).

Almost surely, 2^20961093228 is an apocalyptic number.

It is an amenable number.

20961093228 is an abundant number, since it is smaller than the sum of its proper divisors (30854106516).

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

20961093228 is a wasteful number, since it uses less digits than its factorization.

20961093228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57502 (or 57500 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 20961093228 in words is "twenty billion, nine hundred sixty-one million, ninety-three thousand, two hundred twenty-eight".