20225214451 has 4 divisors (see below), whose sum is σ = 21781000192. Its totient is φ = 18669428712.

The previous prime is 20225214431. The next prime is 20225214469. The reversal of 20225214451 is 15441252202.

It is a happy number.

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 20225214451 - 2⁵ = 20225214419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20225214431) 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, 777892851 + ... + 777892876.

It is an arithmetic number, because the mean of its divisors is an integer number (5445250048).

Almost surely, 2^20225214451 is an apocalyptic number.

20225214451 is a deficient number, since it is larger than the sum of its proper divisors (1555785741).

20225214451 is a wasteful number, since it uses less digits than its factorization.

20225214451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1555785740.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 20225214451 its reverse (15441252202), we get a palindrome (35666466653).

The spelling of 20225214451 in words is "twenty billion, two hundred twenty-five million, two hundred fourteen thousand, four hundred fifty-one".