420123204 has 36 divisors (see below), whose sum is σ = 1063520640. Its totient is φ = 139837680.

The previous prime is 420123173. The next prime is 420123211. The reversal of 420123204 is 402321024.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17769 + ... + 33999.

It is an arithmetic number, because the mean of its divisors is an integer number (29542240).

Almost surely, 2^420123204 is an apocalyptic number.

It is an amenable number.

420123204 is an abundant number, since it is smaller than the sum of its proper divisors (643397436).

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

420123204 is a wasteful number, since it uses less digits than its factorization.

420123204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16960 (or 16955 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420123204 is about 20496.9071813286. The cubic root of 420123204 is about 748.9604584702.

Adding to 420123204 its reverse (402321024), we get a palindrome (822444228).

The spelling of 420123204 in words is "four hundred twenty million, one hundred twenty-three thousand, two hundred four".