22501404 has 36 divisors (see below), whose sum is σ = 60225984. Its totient is φ = 7059072.

The previous prime is 22501403. The next prime is 22501441. The reversal of 22501404 is 40410522.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17772 + ... + 18995.

It is an arithmetic number, because the mean of its divisors is an integer number (1672944).

Almost surely, 2^22501404 is an apocalyptic number.

It is an amenable number.

22501404 is an abundant number, since it is smaller than the sum of its proper divisors (37724580).

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

22501404 is a wasteful number, since it uses less digits than its factorization.

22501404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36794 (or 36789 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22501404 is about 4743.5644825384. The cubic root of 22501404 is about 282.3166806070.

Adding to 22501404 its reverse (40410522), we get a palindrome (62911926).

The spelling of 22501404 in words is "twenty-two million, five hundred one thousand, four hundred four".