20435440153 has 8 divisors (see below), whose sum is σ = 20872293120. Its totient is φ = 19998672960.

The previous prime is 20435440147. The next prime is 20435440159. The reversal of 20435440153 is 35104453402.

It is an interprime number because it is at equal distance from previous prime (20435440147) and next prime (20435440159).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20435440153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20435440159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763233 + ... + 789553.

It is an arithmetic number, because the mean of its divisors is an integer number (2609036640).

Almost surely, 2^20435440153 is an apocalyptic number.

It is an amenable number.

20435440153 is a deficient number, since it is larger than the sum of its proper divisors (436852967).

20435440153 is a wasteful number, since it uses less digits than its factorization.

20435440153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42887.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20435440153 its reverse (35104453402), we get a palindrome (55539893555).

The spelling of 20435440153 in words is "twenty billion, four hundred thirty-five million, four hundred forty thousand, one hundred fifty-three".