20654515064 has 16 divisors (see below), whose sum is σ = 38729025720. Its totient is φ = 10326774880.

The previous prime is 20654515061. The next prime is 20654515103. The reversal of 20654515064 is 46051545602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654515061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175994 + ... + 268854.

Almost surely, 2^20654515064 is an apocalyptic number.

It is an amenable number.

20654515064 is a deficient number, since it is larger than the sum of its proper divisors (18074510656).

20654515064 is a wasteful number, since it uses less digits than its factorization.

20654515064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120670 (or 120666 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 20654515064 in words is "twenty billion, six hundred fifty-four million, five hundred fifteen thousand, sixty-four".