20785244416 has 18 divisors (see below), whose sum is σ = 41489296982. Its totient is φ = 10392622080.

The previous prime is 20785244413. The next prime is 20785244423. The reversal of 20785244416 is 61444258702.

It can be written as a sum of positive squares in only one way, i.e., 16363526400 + 4421718016 = 127920^2 + 66496^2 .

It is not an unprimeable number, because it can be changed into a prime (20785244413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40595925 + ... + 40596436.

Almost surely, 2^20785244416 is an apocalyptic number.

It is an amenable number.

20785244416 is a deficient number, since it is larger than the sum of its proper divisors (20704052566).

20785244416 is an frugal number, since it uses more digits than its factorization.

20785244416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81192377 (or 81192363 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 20785244416 in words is "twenty billion, seven hundred eighty-five million, two hundred forty-four thousand, four hundred sixteen".