20320606505451 has 8 divisors (see below), whose sum is σ = 30964733722624. Its totient is φ = 11611775145960.

The previous prime is 20320606505447. The next prime is 20320606505461. The reversal of 20320606505451 is 15450560602302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20320606505451 - 2² = 20320606505447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20320606505461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 483823964395 + ... + 483823964436.

It is an arithmetic number, because the mean of its divisors is an integer number (3870591715328).

Almost surely, 2^{20320606505451} is an apocalyptic number.

20320606505451 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20320606505451 is a deficient number, since it is larger than the sum of its proper divisors (10644127217173).

20320606505451 is an equidigital number, since it uses as much as digits as its factorization.

20320606505451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967647928841.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 20320606505451 in words is "twenty trillion, three hundred twenty billion, six hundred six million, five hundred five thousand, four hundred fifty-one".