420021033 has 16 divisors (see below), whose sum is σ = 576086016. Its totient is φ = 272054160.

The previous prime is 420021029. The next prime is 420021071. The reversal of 420021033 is 330120024.

It is not a de Polignac number, because 420021033 - 2² = 420021029 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420021073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16116 + ... + 33162.

It is an arithmetic number, because the mean of its divisors is an integer number (36005376).

Almost surely, 2^420021033 is an apocalyptic number.

420021033 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

420021033 is a deficient number, since it is larger than the sum of its proper divisors (156064983).

420021033 is a wasteful number, since it uses less digits than its factorization.

420021033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17284.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 420021033 is about 20494.4146781507. The cubic root of 420021033 is about 748.8997395809.

Adding to 420021033 its reverse (330120024), we get a palindrome (750141057).

The spelling of 420021033 in words is "four hundred twenty million, twenty-one thousand, thirty-three".