20151501945 has 16 divisors (see below), whose sum is σ = 32281316160. Its totient is φ = 10734496704.

The previous prime is 20151501899. The next prime is 20151501947. The reversal of 20151501945 is 54910515102.

It is not a de Polignac number, because 20151501945 - 2¹⁰ = 20151500921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20151501947) 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, 797839 + ... + 822708.

It is an arithmetic number, because the mean of its divisors is an integer number (2017582260).

Almost surely, 2^20151501945 is an apocalyptic number.

It is an amenable number.

20151501945 is a deficient number, since it is larger than the sum of its proper divisors (12129814215).

20151501945 is a wasteful number, since it uses less digits than its factorization.

20151501945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621384.

The product of its (nonzero) digits is 9000, while the sum is 33.

The spelling of 20151501945 in words is "twenty billion, one hundred fifty-one million, five hundred one thousand, nine hundred forty-five".