20405015353 has 8 divisors (see below), whose sum is σ = 20569522176. Its totient is φ = 20241160800.

The previous prime is 20405015339. The next prime is 20405015381. The reversal of 20405015353 is 35351050402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20405015353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20405015333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100153 + ... + 225478.

It is an arithmetic number, because the mean of its divisors is an integer number (2571190272).

Almost surely, 2^20405015353 is an apocalyptic number.

It is an amenable number.

20405015353 is a deficient number, since it is larger than the sum of its proper divisors (164506823).

20405015353 is a wasteful number, since it uses less digits than its factorization.

20405015353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326135.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 20405015353 its reverse (35351050402), we get a palindrome (55756065755).

The spelling of 20405015353 in words is "twenty billion, four hundred five million, fifteen thousand, three hundred fifty-three".