20630217654 has 48 divisors (see below), whose sum is σ = 45490536000. Its totient is φ = 6755110128.

The previous prime is 20630217593. The next prime is 20630217659. The reversal of 20630217654 is 45671203602.

20630217654 is a `hidden beast` number, since 2 + 0 + 630 + 2 + 17 + 6 + 5 + 4 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630217659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1568397 + ... + 1581495.

It is an arithmetic number, because the mean of its divisors is an integer number (947719500).

Almost surely, 2^20630217654 is an apocalyptic number.

20630217654 is an abundant number, since it is smaller than the sum of its proper divisors (24860318346).

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

20630217654 is a wasteful number, since it uses less digits than its factorization.

20630217654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14649 (or 14646 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20630217654 in words is "twenty billion, six hundred thirty million, two hundred seventeen thousand, six hundred fifty-four".