20151055065 has 32 divisors (see below), whose sum is σ = 32816399616. Its totient is φ = 10556156160.

The previous prime is 20151055063. The next prime is 20151055121. The reversal of 20151055065 is 56055015102.

It is not a de Polignac number, because 20151055065 - 2¹ = 20151055063 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20151055063) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 650059 + ... + 680351.

It is an arithmetic number, because the mean of its divisors is an integer number (1025512488).

Almost surely, 2^20151055065 is an apocalyptic number.

It is an amenable number.

20151055065 is a deficient number, since it is larger than the sum of its proper divisors (12665344551).

20151055065 is a wasteful number, since it uses less digits than its factorization.

20151055065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31089.

The product of its (nonzero) digits is 7500, while the sum is 30.

The spelling of 20151055065 in words is "twenty billion, one hundred fifty-one million, fifty-five thousand, sixty-five".