20659073451 has 4 divisors (see below), whose sum is σ = 27545431272. Its totient is φ = 13772715632.

The previous prime is 20659073443. The next prime is 20659073453. The reversal of 20659073451 is 15437095602.

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 20659073451 - 2³ = 20659073443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20659073453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3443178906 + ... + 3443178911.

It is an arithmetic number, because the mean of its divisors is an integer number (6886357818).

Almost surely, 2^20659073451 is an apocalyptic number.

20659073451 is a deficient number, since it is larger than the sum of its proper divisors (6886357821).

20659073451 is an equidigital number, since it uses as much as digits as its factorization.

20659073451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6886357820.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 20659073451 in words is "twenty billion, six hundred fifty-nine million, seventy-three thousand, four hundred fifty-one".