20011522145 has 16 divisors (see below), whose sum is σ = 24442219200. Its totient is φ = 15724995264.

The previous prime is 20011522129. The next prime is 20011522159. The reversal of 20011522145 is 54122511002.

It is a cyclic number.

It is not a de Polignac number, because 20011522145 - 2⁴ = 20011522129 is a prime.

It is a super-2 number, since 2×20011522145² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20011522145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31334 + ... + 202496.

It is an arithmetic number, because the mean of its divisors is an integer number (1527638700).

Almost surely, 2^20011522145 is an apocalyptic number.

It is an amenable number.

20011522145 is a deficient number, since it is larger than the sum of its proper divisors (4430697055).

20011522145 is a wasteful number, since it uses less digits than its factorization.

20011522145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171584.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 20011522145 in words is "twenty billion, eleven million, five hundred twenty-two thousand, one hundred forty-five".