20651606003 has 6 divisors (see below), whose sum is σ = 24023296836. Its totient is φ = 17701376532.

The previous prime is 20651605993. The next prime is 20651606023. The reversal of 20651606003 is 30060615602.

It is not a de Polignac number, because 20651606003 - 2¹⁴ = 20651589619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20651606023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210730625 + ... + 210730722.

It is an arithmetic number, because the mean of its divisors is an integer number (4003882806).

Almost surely, 2^20651606003 is an apocalyptic number.

20651606003 is a deficient number, since it is larger than the sum of its proper divisors (3371690833).

20651606003 is an equidigital number, since it uses as much as digits as its factorization.

20651606003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421461361 (or 421461354 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The spelling of 20651606003 in words is "twenty billion, six hundred fifty-one million, six hundred six thousand, three".