20352708451 has 4 divisors (see below), whose sum is σ = 20736721872. Its totient is φ = 19968695032.

The previous prime is 20352708421. The next prime is 20352708479. The reversal of 20352708451 is 15480725302.

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 20352708451 - 2¹¹ = 20352706403 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20352708451.

It is not an unprimeable number, because it can be changed into a prime (20352708421) 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, 192006631 + ... + 192006736.

It is an arithmetic number, because the mean of its divisors is an integer number (5184180468).

Almost surely, 2^20352708451 is an apocalyptic number.

20352708451 is a deficient number, since it is larger than the sum of its proper divisors (384013421).

20352708451 is an equidigital number, since it uses as much as digits as its factorization.

20352708451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384013420.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 20352708451 in words is "twenty billion, three hundred fifty-two million, seven hundred eight thousand, four hundred fifty-one".