420631260418 has 4 divisors (see below), whose sum is σ = 630946890630. Its totient is φ = 210315630208.

The previous prime is 420631260403. The next prime is 420631260419. The reversal of 420631260418 is 814062136024.

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., 385284628369 + 35346632049 = 620713^2 + 188007^2 .

It is not an unprimeable number, because it can be changed into a prime (420631260419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105157815103 + ... + 105157815106.

Almost surely, 2^420631260418 is an apocalyptic number.

420631260418 is a deficient number, since it is larger than the sum of its proper divisors (210315630212).

420631260418 is a wasteful number, since it uses less digits than its factorization.

420631260418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210315630211.

The product of its (nonzero) digits is 55296, while the sum is 37.

The spelling of 420631260418 in words is "four hundred twenty billion, six hundred thirty-one million, two hundred sixty thousand, four hundred eighteen".