20105433515 has 8 divisors (see below), whose sum is σ = 24778588560. Its totient is φ = 15649634592.

The previous prime is 20105433497. The next prime is 20105433527. The reversal of 20105433515 is 51533450102.

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 20105433515 - 2⁸ = 20105433259 is a prime.

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, 54338825 + ... + 54339194.

It is an arithmetic number, because the mean of its divisors is an integer number (3097323570).

Almost surely, 2^20105433515 is an apocalyptic number.

20105433515 is a deficient number, since it is larger than the sum of its proper divisors (4673155045).

20105433515 is a wasteful number, since it uses less digits than its factorization.

20105433515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108678061.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 20105433515 its reverse (51533450102), we get a palindrome (71638883617).

The spelling of 20105433515 in words is "twenty billion, one hundred five million, four hundred thirty-three thousand, five hundred fifteen".