22421860 has 12 divisors (see below), whose sum is σ = 47085948. Its totient is φ = 8968736.

The previous prime is 22421857. The next prime is 22421863. The reversal of 22421860 is 6812422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22421857) and next prime (22421863).

It can be written as a sum of positive squares in 2 ways, for example, as 16842816 + 5579044 = 4104^2 + 2362^2 .

It is a super-3 number, since 3×22421860³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22421863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560527 + ... + 560566.

It is an arithmetic number, because the mean of its divisors is an integer number (3923829).

Almost surely, 2^22421860 is an apocalyptic number.

22421860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22421860 is an abundant number, since it is smaller than the sum of its proper divisors (24664088).

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

22421860 is a wasteful number, since it uses less digits than its factorization.

22421860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121102 (or 1121100 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 22421860 is about 4735.1726473277. The cubic root of 22421860 is about 281.9836182493.

The spelling of 22421860 in words is "twenty-two million, four hundred twenty-one thousand, eight hundred sixty".