20654515065 has 16 divisors (see below), whose sum is σ = 33387919488. Its totient is φ = 10902176256.

The previous prime is 20654515061. The next prime is 20654515103. The reversal of 20654515065 is 56051545602.

It is a happy number.

It is not a de Polignac number, because 20654515065 - 2² = 20654515061 is a prime.

It is a Curzon number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7096317 + ... + 7099226.

It is an arithmetic number, because the mean of its divisors is an integer number (2086744968).

Almost surely, 2^20654515065 is an apocalyptic number.

It is an amenable number.

20654515065 is a deficient number, since it is larger than the sum of its proper divisors (12733404423).

20654515065 is a wasteful number, since it uses less digits than its factorization.

20654515065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14195648.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 20654515065 in words is "twenty billion, six hundred fifty-four million, five hundred fifteen thousand, sixty-five".