42721047340 has 12 divisors (see below), whose sum is σ = 89714199456. Its totient is φ = 17088418928.

The previous prime is 42721047289. The next prime is 42721047349. The reversal of 42721047340 is 4374012724.

It is a junction number, because it is equal to n+sod(n) for n = 42721047296 and 42721047305.

It is not an unprimeable number, because it can be changed into a prime (42721047349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068026164 + ... + 1068026203.

It is an arithmetic number, because the mean of its divisors is an integer number (7476183288).

Almost surely, 2^42721047340 is an apocalyptic number.

It is an amenable number.

42721047340 is an abundant number, since it is smaller than the sum of its proper divisors (46993152116).

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

42721047340 is a wasteful number, since it uses less digits than its factorization.

42721047340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136052376 (or 2136052374 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 34.

The spelling of 42721047340 in words is "forty-two billion, seven hundred twenty-one million, forty-seven thousand, three hundred forty".