20153343451 has 4 divisors (see below), whose sum is σ = 20227710304. Its totient is φ = 20078976600.

The previous prime is 20153343449. The next prime is 20153343467. The reversal of 20153343451 is 15434335102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15434335102 = 2 ⋅7717167551.

It is a cyclic number.

It is not a de Polignac number, because 20153343451 - 2¹ = 20153343449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20153343421) 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, 37183020 + ... + 37183561.

It is an arithmetic number, because the mean of its divisors is an integer number (5056927576).

Almost surely, 2^20153343451 is an apocalyptic number.

20153343451 is a deficient number, since it is larger than the sum of its proper divisors (74366853).

20153343451 is an equidigital number, since it uses as much as digits as its factorization.

20153343451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74366852.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 20153343451 its reverse (15434335102), we get a palindrome (35587678553).

The spelling of 20153343451 in words is "twenty billion, one hundred fifty-three million, three hundred forty-three thousand, four hundred fifty-one".