420354021450 has 48 divisors (see below), whose sum is σ = 1137248702496. Its totient is φ = 101904004800.

The previous prime is 420354021449. The next prime is 420354021457. The reversal of 420354021450 is 54120453024.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (420354021457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127378357 + ... + 127381656.

It is an arithmetic number, because the mean of its divisors is an integer number (23692681302).

Almost surely, 2^420354021450 is an apocalyptic number.

420354021450 is an abundant number, since it is smaller than the sum of its proper divisors (716894681046).

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

420354021450 is a wasteful number, since it uses less digits than its factorization.

420354021450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254760039 (or 254760034 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 420354021450 its reverse (54120453024), we get a palindrome (474474474474).

The spelling of 420354021450 in words is "four hundred twenty billion, three hundred fifty-four million, twenty-one thousand, four hundred fifty".