23821420 has 48 divisors (see below), whose sum is σ = 60540480. Its totient is φ = 7686144.

The previous prime is 23821409. The next prime is 23821463. The reversal of 23821420 is 2412832.

It is a junction number, because it is equal to n+sod(n) for n = 23821391 and 23821400.

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, 2625 + ... + 7384.

It is an arithmetic number, because the mean of its divisors is an integer number (1261260).

Almost surely, 2^23821420 is an apocalyptic number.

23821420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23821420 is an abundant number, since it is smaller than the sum of its proper divisors (36719060).

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

23821420 is a wasteful number, since it uses less digits than its factorization.

23821420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10042 (or 10040 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 23821420 is about 4880.7192092969. The cubic root of 23821420 is about 287.7326962979.

The spelling of 23821420 in words is "twenty-three million, eight hundred twenty-one thousand, four hundred twenty".