22740451 has 4 divisors (see below), whose sum is σ = 22750000. Its totient is φ = 22730904.

The previous prime is 22740439. The next prime is 22740457. The reversal of 22740451 is 15404722.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22740451 - 2⁷ = 22740323 is a prime.

It is a super-2 number, since 2×22740451² = 1034256223366802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22740457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050 + ... + 7048.

It is an arithmetic number, because the mean of its divisors is an integer number (5687500).

Almost surely, 2^22740451 is an apocalyptic number.

22740451 is a deficient number, since it is larger than the sum of its proper divisors (9549).

22740451 is an equidigital number, since it uses as much as digits as its factorization.

22740451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9548.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 22740451 is about 4768.6948948323. The cubic root of 22740451 is about 283.3129054092.

The spelling of 22740451 in words is "twenty-two million, seven hundred forty thousand, four hundred fifty-one".