22503820 has 24 divisors (see below), whose sum is σ = 47348784. Its totient is φ = 8984256.

The previous prime is 22503791. The next prime is 22503823. The reversal of 22503820 is 2830522.

It is a junction number, because it is equal to n+sod(n) for n = 22503791 and 22503800.

It is not an unprimeable number, because it can be changed into a prime (22503823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16899 + ... + 18181.

It is an arithmetic number, because the mean of its divisors is an integer number (1972866).

Almost surely, 2^22503820 is an apocalyptic number.

22503820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22503820 is an abundant number, since it is smaller than the sum of its proper divisors (24844964).

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

22503820 is a wasteful number, since it uses less digits than its factorization.

22503820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169 (or 2167 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 22503820 is about 4743.8191365186. The cubic root of 22503820 is about 282.3267844608.

The spelling of 22503820 in words is "twenty-two million, five hundred three thousand, eight hundred twenty".