20024236453 has 4 divisors (see below), whose sum is σ = 21564562348. Its totient is φ = 18483910560.

The previous prime is 20024236417. The next prime is 20024236459. The reversal of 20024236453 is 35463242002.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12301693569 + 7722542884 = 110913^2 + 87878^2 .

It is a cyclic number.

It is not a de Polignac number, because 20024236453 - 2⁹ = 20024235941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20024236459) 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, 770162928 + ... + 770162953.

It is an arithmetic number, because the mean of its divisors is an integer number (5391140587).

Almost surely, 2^20024236453 is an apocalyptic number.

It is an amenable number.

20024236453 is a deficient number, since it is larger than the sum of its proper divisors (1540325895).

20024236453 is a wasteful number, since it uses less digits than its factorization.

20024236453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540325894.

The product of its (nonzero) digits is 34560, while the sum is 31.

Adding to 20024236453 its reverse (35463242002), we get a palindrome (55487478455).

The spelling of 20024236453 in words is "twenty billion, twenty-four million, two hundred thirty-six thousand, four hundred fifty-three".