200021454 has 32 divisors (see below), whose sum is σ = 447342240. Its totient is φ = 66246336.

The previous prime is 200021447. The next prime is 200021477. The reversal of 200021454 is 454120002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3319 + ... + 20274.

It is an arithmetic number, because the mean of its divisors is an integer number (13979445).

Almost surely, 2^200021454 is an apocalyptic number.

200021454 is an abundant number, since it is smaller than the sum of its proper divisors (247320786).

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

200021454 is a wasteful number, since it uses less digits than its factorization.

200021454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23761 (or 23755 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 200021454 is about 14142.8941168348. The cubic root of 200021454 is about 584.8244575204.

Adding to 200021454 its reverse (454120002), we get a palindrome (654141456).

The spelling of 200021454 in words is "two hundred million, twenty-one thousand, four hundred fifty-four".