420503630 has 24 divisors (see below), whose sum is σ = 798847272. Its totient is φ = 159347376.

The previous prime is 420503627. The next prime is 420503639. The reversal of 420503630 is 36305024.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 420503596 and 420503605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420503639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54632 + ... + 61851.

It is an arithmetic number, because the mean of its divisors is an integer number (33285303).

Almost surely, 2^420503630 is an apocalyptic number.

420503630 is a deficient number, since it is larger than the sum of its proper divisors (378343642).

420503630 is a wasteful number, since it uses less digits than its factorization.

420503630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116528 (or 116509 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 420503630 is about 20506.1851644815. The cubic root of 420503630 is about 749.1864541396.

Adding to 420503630 its reverse (36305024), we get a palindrome (456808654).

The spelling of 420503630 in words is "four hundred twenty million, five hundred three thousand, six hundred thirty".