20634244153 has 8 divisors (see below), whose sum is σ = 20765678400. Its totient is φ = 20502989808.

The previous prime is 20634244151. The next prime is 20634244187. The reversal of 20634244153 is 35144243602.

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 20634244153 - 2¹ = 20634244151 is a prime.

It is a super-2 number, since 2×20634244153² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20634244151) 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, 189003 + ... + 277471.

It is an arithmetic number, because the mean of its divisors is an integer number (2595709800).

Almost surely, 2^20634244153 is an apocalyptic number.

It is an amenable number.

20634244153 is a deficient number, since it is larger than the sum of its proper divisors (131434247).

20634244153 is a wasteful number, since it uses less digits than its factorization.

20634244153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89951.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 20634244153 its reverse (35144243602), we get a palindrome (55778487755).

The spelling of 20634244153 in words is "twenty billion, six hundred thirty-four million, two hundred forty-four thousand, one hundred fifty-three".