20475470145 has 64 divisors (see below), whose sum is σ = 36829142784. Its totient is φ = 9646801920.

The previous prime is 20475470129. The next prime is 20475470179. The reversal of 20475470145 is 54107457402.

It is not a de Polignac number, because 20475470145 - 2⁴ = 20475470129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 416854 + ... + 463376.

It is an arithmetic number, because the mean of its divisors is an integer number (575455356).

Almost surely, 2^20475470145 is an apocalyptic number.

It is an amenable number.

20475470145 is a deficient number, since it is larger than the sum of its proper divisors (16353672639).

20475470145 is a wasteful number, since it uses less digits than its factorization.

20475470145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46642.

The product of its (nonzero) digits is 156800, while the sum is 39.

The spelling of 20475470145 in words is "twenty billion, four hundred seventy-five million, four hundred seventy thousand, one hundred forty-five".