20553362453 has 8 divisors (see below), whose sum is σ = 22140923448. Its totient is φ = 18966734784.

The previous prime is 20553362383. The next prime is 20553362497. The reversal of 20553362453 is 35426335502.

It can be written as a sum of positive squares in 4 ways, for example, as 8416594564 + 12136767889 = 91742^2 + 110167^2 .

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 20553362453 - 2³⁴ = 3373493269 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 (20553362653) 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, 187250 + ... + 275987.

It is an arithmetic number, because the mean of its divisors is an integer number (2767615431).

Almost surely, 2^20553362453 is an apocalyptic number.

It is an amenable number.

20553362453 is a deficient number, since it is larger than the sum of its proper divisors (1587560995).

20553362453 is a wasteful number, since it uses less digits than its factorization.

20553362453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466663.

The product of its (nonzero) digits is 324000, while the sum is 38.

Adding to 20553362453 its reverse (35426335502), we get a palindrome (55979697955).

The spelling of 20553362453 in words is "twenty billion, five hundred fifty-three million, three hundred sixty-two thousand, four hundred fifty-three".