42019636 has 12 divisors (see below), whose sum is σ = 74263140. Its totient is φ = 20801600.

The previous prime is 42019613. The next prime is 42019651. The reversal of 42019636 is 63691024.

It can be written as a sum of positive squares in 2 ways, for example, as 21715600 + 20304036 = 4660^2 + 4506^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42019598 and 42019607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51601 + ... + 52408.

It is an arithmetic number, because the mean of its divisors is an integer number (6188595).

Almost surely, 2^42019636 is an apocalyptic number.

It is an amenable number.

42019636 is a deficient number, since it is larger than the sum of its proper divisors (32243504).

42019636 is a wasteful number, since it uses less digits than its factorization.

42019636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104114 (or 104112 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 42019636 is about 6482.2554716703. The cubic root of 42019636 is about 347.6568268894.

The spelling of 42019636 in words is "forty-two million, nineteen thousand, six hundred thirty-six".