20430100242 has 24 divisors (see below), whose sum is σ = 44509783500. Its totient is φ = 6772407840.

The previous prime is 20430100219. The next prime is 20430100247. The reversal of 20430100242 is 24200103402.

It can be written as a sum of positive squares in 2 ways, for example, as 19853091801 + 577008441 = 140901^2 + 24021^2 .

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 (20430100247) 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, 3132117 + ... + 3138632.

Almost surely, 2^20430100242 is an apocalyptic number.

20430100242 is an abundant number, since it is smaller than the sum of its proper divisors (24079683258).

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

20430100242 is a wasteful number, since it uses less digits than its factorization.

20430100242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6270938 (or 6270935 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20430100242 its reverse (24200103402), we get a palindrome (44630203644).

The spelling of 20430100242 in words is "twenty billion, four hundred thirty million, one hundred thousand, two hundred forty-two".