421570447418 has 4 divisors (see below), whose sum is σ = 632355671130. Its totient is φ = 210785223708.

The previous prime is 421570447357. The next prime is 421570447427. The reversal of 421570447418 is 814744075124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 317637069649 + 103933377769 = 563593^2 + 322387^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105392611853 + ... + 105392611856.

Almost surely, 2^421570447418 is an apocalyptic number.

421570447418 is a deficient number, since it is larger than the sum of its proper divisors (210785223712).

421570447418 is a wasteful number, since it uses less digits than its factorization.

421570447418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210785223711.

The product of its (nonzero) digits is 1003520, while the sum is 47.

The spelling of 421570447418 in words is "four hundred twenty-one billion, five hundred seventy million, four hundred forty-seven thousand, four hundred eighteen".