20551710416 has 20 divisors (see below), whose sum is σ = 39877260192. Its totient is φ = 10260804576.

The previous prime is 20551710409. The next prime is 20551710451. The reversal of 20551710416 is 61401715502.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 929396 + ... + 951251.

Almost surely, 2^20551710416 is an apocalyptic number.

It is an amenable number.

20551710416 is a deficient number, since it is larger than the sum of its proper divisors (19325549776).

20551710416 is a wasteful number, since it uses less digits than its factorization.

20551710416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881338 (or 1881332 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 20551710416 in words is "twenty billion, five hundred fifty-one million, seven hundred ten thousand, four hundred sixteen".