22016540 has 48 divisors (see below), whose sum is σ = 56908992. Its totient is φ = 6967296.

The previous prime is 22016507. The next prime is 22016557. The reversal of 22016540 is 4561022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4229 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (1185604).

Almost surely, 2^22016540 is an apocalyptic number.

22016540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22016540 is an abundant number, since it is smaller than the sum of its proper divisors (34892452).

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

22016540 is a wasteful number, since it uses less digits than its factorization.

22016540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12126 (or 12124 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22016540 is about 4692.1785984764. The cubic root of 22016540 is about 280.2741362790.

Adding to 22016540 its reverse (4561022), we get a palindrome (26577562).

The spelling of 22016540 in words is "twenty-two million, sixteen thousand, five hundred forty".