20225451 has 8 divisors (see below), whose sum is σ = 27015120. Its totient is φ = 13459712.

The previous prime is 20225419. The next prime is 20225477. The reversal of 20225451 is 15452202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20225451 - 2⁵ = 20225419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20225251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3906 + ... + 7463.

It is an arithmetic number, because the mean of its divisors is an integer number (3376890).

Almost surely, 2^20225451 is an apocalyptic number.

20225451 is a deficient number, since it is larger than the sum of its proper divisors (6789669).

20225451 is a wasteful number, since it uses less digits than its factorization.

20225451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11965.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 20225451 is about 4497.2715061468. The cubic root of 20225451 is about 272.4578999574.

Adding to 20225451 its reverse (15452202), we get a palindrome (35677653).

The spelling of 20225451 in words is "twenty million, two hundred twenty-five thousand, four hundred fifty-one".