22649820 has 48 divisors (see below), whose sum is σ = 64901760. Its totient is φ = 5898816.

The previous prime is 22649807. The next prime is 22649821. The reversal of 22649820 is 2894622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22649821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1810 + ... + 6969.

It is an arithmetic number, because the mean of its divisors is an integer number (1352120).

Almost surely, 2^22649820 is an apocalyptic number.

22649820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22649820 is an abundant number, since it is smaller than the sum of its proper divisors (42251940).

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

22649820 is a wasteful number, since it uses less digits than its factorization.

22649820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8834 (or 8832 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 22649820 is about 4759.1827029439. The cubic root of 22649820 is about 282.9360275267.

The spelling of 22649820 in words is "twenty-two million, six hundred forty-nine thousand, eight hundred twenty".