20225511609 has 32 divisors (see below), whose sum is σ = 30122916480. Its totient is φ = 11996024832.

The previous prime is 20225511599. The next prime is 20225511623. The reversal of 20225511609 is 90611552202.

It is not a de Polignac number, because 20225511609 - 2⁸ = 20225511353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20225511609.

It is not an unprimeable number, because it can be changed into a prime (20225511809) 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, 419997 + ... + 465669.

It is an arithmetic number, because the mean of its divisors is an integer number (941341140).

Almost surely, 2^20225511609 is an apocalyptic number.

It is an amenable number.

20225511609 is a deficient number, since it is larger than the sum of its proper divisors (9897404871).

20225511609 is a wasteful number, since it uses less digits than its factorization.

20225511609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46169.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 20225511609 in words is "twenty billion, two hundred twenty-five million, five hundred eleven thousand, six hundred nine".