22061900 has 36 divisors (see below), whose sum is σ = 54715248. Its totient is φ = 7563840.

The previous prime is 22061891. The next prime is 22061911. The reversal of 22061900 is 916022.

It is a super-2 number, since 2×22061900² = 973454863220000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15059 + ... + 16458.

It is an arithmetic number, because the mean of its divisors is an integer number (1519868).

Almost surely, 2^22061900 is an apocalyptic number.

22061900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22061900 is an abundant number, since it is smaller than the sum of its proper divisors (32653348).

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

22061900 is a wasteful number, since it uses less digits than its factorization.

22061900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31538 (or 31531 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 22061900 is about 4697.0096870243. The cubic root of 22061900 is about 280.4664843032.

Adding to 22061900 its reverse (916022), we get a palindrome (22977922).

The spelling of 22061900 in words is "twenty-two million, sixty-one thousand, nine hundred".