22420851 has 4 divisors (see below), whose sum is σ = 29894472. Its totient is φ = 14947232.

The previous prime is 22420847. The next prime is 22420861. The reversal of 22420851 is 15802422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22420851 - 2² = 22420847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22420831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3736806 + ... + 3736811.

It is an arithmetic number, because the mean of its divisors is an integer number (7473618).

Almost surely, 2^22420851 is an apocalyptic number.

22420851 is a deficient number, since it is larger than the sum of its proper divisors (7473621).

22420851 is an equidigital number, since it uses as much as digits as its factorization.

22420851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473620.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 22420851 is about 4735.0661030233. The cubic root of 22420851 is about 281.9793883632.

The spelling of 22420851 in words is "twenty-two million, four hundred twenty thousand, eight hundred fifty-one".