20150343555 has 16 divisors (see below), whose sum is σ = 32385131520. Its totient is φ = 10698655968.

The previous prime is 20150343553. The next prime is 20150343569. The reversal of 20150343555 is 55534305102.

It is a happy number.

It is not a de Polignac number, because 20150343555 - 2¹ = 20150343553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20150343553) 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 15 ways as a sum of consecutive naturals, for example, 3008665 + ... + 3015354.

It is an arithmetic number, because the mean of its divisors is an integer number (2024070720).

Almost surely, 2^20150343555 is an apocalyptic number.

20150343555 is a deficient number, since it is larger than the sum of its proper divisors (12234787965).

20150343555 is a wasteful number, since it uses less digits than its factorization.

20150343555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6024250.

The product of its (nonzero) digits is 45000, while the sum is 33.

Adding to 20150343555 its reverse (55534305102), we get a palindrome (75684648657).

The spelling of 20150343555 in words is "twenty billion, one hundred fifty million, three hundred forty-three thousand, five hundred fifty-five".