20042364243 has 24 divisors (see below), whose sum is σ = 30475166400. Its totient is φ = 11618751760.

The previous prime is 20042364241. The next prime is 20042364313. The reversal of 20042364243 is 34246324002.

It is not a de Polignac number, because 20042364243 - 2¹ = 20042364241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20042364243.

It is not an unprimeable number, because it can be changed into a prime (20042364241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 556593 + ... + 591506.

It is an arithmetic number, because the mean of its divisors is an integer number (1269798600).

Almost surely, 2^20042364243 is an apocalyptic number.

20042364243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20042364243 is a deficient number, since it is larger than the sum of its proper divisors (10432802157).

20042364243 is a wasteful number, since it uses less digits than its factorization.

20042364243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148159 (or 1148136 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 20042364243 its reverse (34246324002), we get a palindrome (54288688245).

The spelling of 20042364243 in words is "twenty billion, forty-two million, three hundred sixty-four thousand, two hundred forty-three".