40040020042 has 32 divisors (see below), whose sum is σ = 66444193728. Its totient is φ = 17944800000.

The previous prime is 40040020039. The next prime is 40040020091. The reversal of 40040020042 is 24002004004.

It is a junction number, because it is equal to n+sod(n) for n = 40040019998 and 40040020025.

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, 498117 + ... + 572887.

It is an arithmetic number, because the mean of its divisors is an integer number (2076381054).

Almost surely, 2^40040020042 is an apocalyptic number.

40040020042 is a deficient number, since it is larger than the sum of its proper divisors (26404173686).

40040020042 is a wasteful number, since it uses less digits than its factorization.

40040020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75126.

The product of its (nonzero) digits is 256, while the sum is 16.

Adding to 40040020042 its reverse (24002004004), we get a palindrome (64042024046).

The spelling of 40040020042 in words is "forty billion, forty million, twenty thousand, forty-two".