22351980 has 96 divisors (see below), whose sum is σ = 75317760. Its totient is φ = 4838400.

The previous prime is 22351921. The next prime is 22351993. The reversal of 22351980 is 8915322.

It is a happy number.

It is a super-2 number, since 2×22351980² = 999222019840800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6580 + ... + 9380.

It is an arithmetic number, because the mean of its divisors is an integer number (784560).

Almost surely, 2^22351980 is an apocalyptic number.

22351980 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 22351980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37658880).

22351980 is an abundant number, since it is smaller than the sum of its proper divisors (52965780).

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

22351980 is a wasteful number, since it uses less digits than its factorization.

22351980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2839 (or 2837 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 22351980 is about 4727.7880663160. The cubic root of 22351980 is about 281.6903698799.

The spelling of 22351980 in words is "twenty-two million, three hundred fifty-one thousand, nine hundred eighty".