51426018 has 48 divisors (see below), whose sum is σ = 129108096. Its totient is φ = 14489280.

The previous prime is 51426017. The next prime is 51426031. The reversal of 51426018 is 81062415.

51426018 is a `hidden beast` number, since 51 + 4 + 2 + 601 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51425982 and 51426000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51426017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6403 + ... + 11993.

It is an arithmetic number, because the mean of its divisors is an integer number (2689752).

Almost surely, 2^51426018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51426018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64554048).

51426018 is an abundant number, since it is smaller than the sum of its proper divisors (77682078).

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

51426018 is a wasteful number, since it uses less digits than its factorization.

51426018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5679 (or 5676 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 51426018 is about 7171.1936244952. The cubic root of 51426018 is about 371.8727018477.

The spelling of 51426018 in words is "fifty-one million, four hundred twenty-six thousand, eighteen".