420674018 has 6 divisors (see below), whose sum is σ = 631054539. Its totient is φ = 210322506.

The previous prime is 420673943. The next prime is 420674021. The reversal of 420674018 is 810476024.

It can be written as a sum of positive squares in only one way, i.e., 210337009 + 210337009 = 14503^2 + 14503^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14503.

It is a super-3 number, since 3×420674018³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 21755 + ... + 36257.

Almost surely, 2^420674018 is an apocalyptic number.

420674018 is a deficient number, since it is larger than the sum of its proper divisors (210380521).

420674018 is an frugal number, since it uses more digits than its factorization.

420674018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29008 (or 14505 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 420674018 is about 20510.3392950970. The cubic root of 420674018 is about 749.2876305502.

Multiplying 420674018 by its sum of digits (32), we get a square (13461568576 = 116024²).

The spelling of 420674018 in words is "four hundred twenty million, six hundred seventy-four thousand, eighteen".