42020324451 has 32 divisors (see below), whose sum is σ = 72351398400. Its totient is φ = 23604631200.

The previous prime is 42020324443. The next prime is 42020324461. The reversal of 42020324451 is 15442302024.

42020324451 is a `hidden beast` number, since 4 + 2 + 0 + 203 + 2 + 4 + 451 = 666.

It is not a de Polignac number, because 42020324451 - 2³ = 42020324443 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (42020324431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1873000 + ... + 1895301.

It is an arithmetic number, because the mean of its divisors is an integer number (2260981200).

Almost surely, 2^42020324451 is an apocalyptic number.

42020324451 is a deficient number, since it is larger than the sum of its proper divisors (30331073949).

42020324451 is a wasteful number, since it uses less digits than its factorization.

42020324451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768376 (or 3768370 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 42020324451 its reverse (15442302024), we get a palindrome (57462626475).

The spelling of 42020324451 in words is "forty-two billion, twenty million, three hundred twenty-four thousand, four hundred fifty-one".