20045213405 has 16 divisors (see below), whose sum is σ = 27535453824. Its totient is φ = 13722851520.

The previous prime is 20045213393. The next prime is 20045213411. The reversal of 20045213405 is 50431254002.

It is a happy number.

It is not a de Polignac number, because 20045213405 - 2¹⁰ = 20045212381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 445691 + ... + 488600.

It is an arithmetic number, because the mean of its divisors is an integer number (1720965864).

Almost surely, 2^20045213405 is an apocalyptic number.

It is an amenable number.

20045213405 is a deficient number, since it is larger than the sum of its proper divisors (7490240419).

20045213405 is an equidigital number, since it uses as much as digits as its factorization.

20045213405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934916.

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20045213405 its reverse (50431254002), we get a palindrome (70476467407).

The spelling of 20045213405 in words is "twenty billion, forty-five million, two hundred thirteen thousand, four hundred five".