22485820 has 48 divisors (see below), whose sum is σ = 54871488. Its totient is φ = 7580160.

The previous prime is 22485809. The next prime is 22485847. The reversal of 22485820 is 2858422.

It is a super-2 number, since 2×22485820² = 1011224202144800, which contains 22 as substring.

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, 7224 + ... + 9856.

It is an arithmetic number, because the mean of its divisors is an integer number (1143156).

Almost surely, 2^22485820 is an apocalyptic number.

22485820 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 22485820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27435744).

22485820 is an abundant number, since it is smaller than the sum of its proper divisors (32385668).

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

22485820 is a wasteful number, since it uses less digits than its factorization.

22485820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710 (or 2708 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 22485820 is about 4741.9215514388. The cubic root of 22485820 is about 282.2514900195.

The spelling of 22485820 in words is "twenty-two million, four hundred eighty-five thousand, eight hundred twenty".