20555616782 has 8 divisors (see below), whose sum is σ = 30834156936. Its totient is φ = 10277564472.

The previous prime is 20555616751. The next prime is 20555616797. The reversal of 20555616782 is 28761655502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13448 + ... + 203204.

It is an arithmetic number, because the mean of its divisors is an integer number (3854269617).

Almost surely, 2^20555616782 is an apocalyptic number.

20555616782 is a deficient number, since it is larger than the sum of its proper divisors (10278540154).

20555616782 is a wasteful number, since it uses less digits than its factorization.

20555616782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243922.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 20555616782 in words is "twenty billion, five hundred fifty-five million, six hundred sixteen thousand, seven hundred eighty-two".