20003451305 has 16 divisors (see below), whose sum is σ = 24076362240. Its totient is φ = 15954690432.

The previous prime is 20003451287. The next prime is 20003451331. The reversal of 20003451305 is 50315430002.

It is a cyclic number.

It is not a de Polignac number, because 20003451305 - 2¹⁰ = 20003450281 is a prime.

It is a super-2 number, since 2×20003451305² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2451242 + ... + 2459388.

It is an arithmetic number, because the mean of its divisors is an integer number (1504772640).

Almost surely, 2^20003451305 is an apocalyptic number.

It is an amenable number.

20003451305 is a deficient number, since it is larger than the sum of its proper divisors (4072910935).

20003451305 is an equidigital number, since it uses as much as digits as its factorization.

20003451305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9568.

The product of its (nonzero) digits is 1800, while the sum is 23.

Adding to 20003451305 its reverse (50315430002), we get a palindrome (70318881307).

The spelling of 20003451305 in words is "twenty billion, three million, four hundred fifty-one thousand, three hundred five".