20405003045 has 8 divisors (see below), whose sum is σ = 27984004224. Its totient is φ = 13992002064.

The previous prime is 20405003027. The next prime is 20405003063. The reversal of 20405003045 is 54030050402.

It is an interprime number because it is at equal distance from previous prime (20405003027) and next prime (20405003063).

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

It is a cyclic number.

It is not a de Polignac number, because 20405003045 - 2¹⁸ = 20404740901 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 20405003045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291500009 + ... + 291500078.

It is an arithmetic number, because the mean of its divisors is an integer number (3498000528).

Almost surely, 2^20405003045 is an apocalyptic number.

It is an amenable number.

20405003045 is a deficient number, since it is larger than the sum of its proper divisors (7579001179).

20405003045 is an equidigital number, since it uses as much as digits as its factorization.

20405003045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583000099.

The product of its (nonzero) digits is 2400, while the sum is 23.

Adding to 20405003045 its reverse (54030050402), we get a palindrome (74435053447).

The spelling of 20405003045 in words is "twenty billion, four hundred five million, three thousand, forty-five".