20145550611 has 32 divisors (see below), whose sum is σ = 28470816000. Its totient is φ = 12648924288.

The previous prime is 20145550583. The next prime is 20145550619. The reversal of 20145550611 is 11605554102.

It is not a de Polignac number, because 20145550611 - 2¹⁸ = 20145288467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20145550619) 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, 3210385 + ... + 3216653.

It is an arithmetic number, because the mean of its divisors is an integer number (889713000).

Almost surely, 2^20145550611 is an apocalyptic number.

20145550611 is a deficient number, since it is larger than the sum of its proper divisors (8325265389).

20145550611 is a wasteful number, since it uses less digits than its factorization.

20145550611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7203.

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 20145550611 in words is "twenty billion, one hundred forty-five million, five hundred fifty thousand, six hundred eleven".