20430111042 has 24 divisors (see below), whose sum is σ = 48289353840. Its totient is φ = 6190942680.

The previous prime is 20430111041. The next prime is 20430111043. The reversal of 20430111042 is 24011103402.

It is an interprime number because it is at equal distance from previous prime (20430111041) and next prime (20430111043).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20430111041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51590992 + ... + 51591387.

It is an arithmetic number, because the mean of its divisors is an integer number (2012056410).

Almost surely, 2^20430111042 is an apocalyptic number.

20430111042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20430111042 is an abundant number, since it is smaller than the sum of its proper divisors (27859242798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20430111042 is a wasteful number, since it uses less digits than its factorization.

20430111042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103182398 (or 103182395 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20430111042 its reverse (24011103402), we get a palindrome (44441214444).

The spelling of 20430111042 in words is "twenty billion, four hundred thirty million, one hundred eleven thousand, forty-two".