420235221504 has 640 divisors, whose sum is σ = 1400468078592. Its totient is φ = 109247201280.

The previous prime is 420235221491. The next prime is 420235221533. The reversal of 420235221504 is 405122532024.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 998183214 + ... + 998183634.

Almost surely, 2^420235221504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 420235221504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700234039296).

420235221504 is an abundant number, since it is smaller than the sum of its proper divisors (980232857088).

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

420235221504 is a wasteful number, since it uses less digits than its factorization.

420235221504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 620 counting only the distinct ones).

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

Adding to 420235221504 its reverse (405122532024), we get a palindrome (825357753528).

The spelling of 420235221504 in words is "four hundred twenty billion, two hundred thirty-five million, two hundred twenty-one thousand, five hundred four".