20442242430 has 32 divisors (see below), whose sum is σ = 54512647200. Its totient is φ = 5451264576.

The previous prime is 20442242417. The next prime is 20442242449. The reversal of 20442242430 is 3424224402.

20442242430 is a `hidden beast` number, since 2 + 0 + 4 + 4 + 224 + 2 + 430 = 666.

It is a super-3 number, since 3×20442242430³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20442242394 and 20442242403.

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, 37855735 + ... + 37856274.

It is an arithmetic number, because the mean of its divisors is an integer number (1703520225).

Almost surely, 2^20442242430 is an apocalyptic number.

20442242430 is an abundant number, since it is smaller than the sum of its proper divisors (34070404770).

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

20442242430 is a wasteful number, since it uses less digits than its factorization.

20442242430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75712025 (or 75712019 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 20442242430 its reverse (3424224402), we get a palindrome (23866466832).

The spelling of 20442242430 in words is "twenty billion, four hundred forty-two million, two hundred forty-two thousand, four hundred thirty".