208423020 has 96 divisors (see below), whose sum is σ = 632217600. Its totient is φ = 50999040.

The previous prime is 208423003. The next prime is 208423063. The reversal of 208423020 is 20324802.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148281 + ... + 149679.

It is an arithmetic number, because the mean of its divisors is an integer number (6585600).

Almost surely, 2^208423020 is an apocalyptic number.

208423020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208423020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316108800).

208423020 is an abundant number, since it is smaller than the sum of its proper divisors (423794580).

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

208423020 is a wasteful number, since it uses less digits than its factorization.

208423020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 208423020 is about 14436.8632327109. The cubic root of 208423020 is about 592.9006067852.

Adding to 208423020 its reverse (20324802), we get a palindrome (228747822).

The spelling of 208423020 in words is "two hundred eight million, four hundred twenty-three thousand, twenty".