20042561245 has 16 divisors (see below), whose sum is σ = 27874084608. Its totient is φ = 13549898880.

The previous prime is 20042561183. The next prime is 20042561251. The reversal of 20042561245 is 54216524002.

It is not a de Polignac number, because 20042561245 - 2¹¹ = 20042559197 is a prime.

It is a super-2 number, since 2×20042561245² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 4030224 + ... + 4035193.

It is an arithmetic number, because the mean of its divisors is an integer number (1742130288).

Almost surely, 2^20042561245 is an apocalyptic number.

It is an amenable number.

20042561245 is a deficient number, since it is larger than the sum of its proper divisors (7831523363).

20042561245 is an equidigital number, since it uses as much as digits as its factorization.

20042561245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8065500.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 20042561245 in words is "twenty billion, forty-two million, five hundred sixty-one thousand, two hundred forty-five".