20122425451 has 4 divisors (see below), whose sum is σ = 20142369400. Its totient is φ = 20102481504.

The previous prime is 20122425443. The next prime is 20122425461. The reversal of 20122425451 is 15452422102.

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 20122425451 - 2³ = 20122425443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20122425461) 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, 9970461 + ... + 9972478.

It is an arithmetic number, because the mean of its divisors is an integer number (5035592350).

Almost surely, 2^20122425451 is an apocalyptic number.

20122425451 is a deficient number, since it is larger than the sum of its proper divisors (19943949).

20122425451 is a wasteful number, since it uses less digits than its factorization.

20122425451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19943948.

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

Adding to 20122425451 its reverse (15452422102), we get a palindrome (35574847553).

The spelling of 20122425451 in words is "twenty billion, one hundred twenty-two million, four hundred twenty-five thousand, four hundred fifty-one".