20554266064 has 10 divisors (see below), whose sum is σ = 39823890530. Its totient is φ = 10277133024.

The previous prime is 20554266049. The next prime is 20554266067. The reversal of 20554266064 is 46066245502.

It can be written as a sum of positive squares in only one way, i.e., 16144243600 + 4410022464 = 127060^2 + 66408^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554266067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642320799 + ... + 642320830.

It is an arithmetic number, because the mean of its divisors is an integer number (3982389053).

Almost surely, 2^20554266064 is an apocalyptic number.

It is an amenable number.

20554266064 is a deficient number, since it is larger than the sum of its proper divisors (19269624466).

20554266064 is a wasteful number, since it uses less digits than its factorization.

20554266064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284641637 (or 1284641631 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 20554266064 in words is "twenty billion, five hundred fifty-four million, two hundred sixty-six thousand, sixty-four".