420021010 has 16 divisors (see below), whose sum is σ = 763105536. Its totient is φ = 166437808.

The previous prime is 420020987. The next prime is 420021029. The reversal of 420021010 is 10120024.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195202 + ... + 197341.

It is an arithmetic number, because the mean of its divisors is an integer number (47694096).

Almost surely, 2^420021010 is an apocalyptic number.

420021010 is a deficient number, since it is larger than the sum of its proper divisors (343084526).

420021010 is a wasteful number, since it uses less digits than its factorization.

420021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392657.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 420021010 is about 20494.4141170222. The cubic root of 420021010 is about 748.8997259112.

Adding to 420021010 its reverse (10120024), we get a palindrome (430141034).

The spelling of 420021010 in words is "four hundred twenty million, twenty-one thousand, ten".