20612540063 has 4 divisors (see below), whose sum is σ = 20738997528. Its totient is φ = 20486082600.

The previous prime is 20612540059. The next prime is 20612540077. The reversal of 20612540063 is 36004521602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20612540063 - 2² = 20612540059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612540083) 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, 63228488 + ... + 63228813.

It is an arithmetic number, because the mean of its divisors is an integer number (5184749382).

Almost surely, 2^20612540063 is an apocalyptic number.

20612540063 is a deficient number, since it is larger than the sum of its proper divisors (126457465).

20612540063 is a wasteful number, since it uses less digits than its factorization.

20612540063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126457464.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 20612540063 in words is "twenty billion, six hundred twelve million, five hundred forty thousand, sixty-three".