20145455153 has 4 divisors (see below), whose sum is σ = 20280659700. Its totient is φ = 20010250608.

The previous prime is 20145455149. The next prime is 20145455159. The reversal of 20145455153 is 35155454102.

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 4747623409 + 15397831744 = 68903^2 + 124088^2 .

It is a cyclic number.

It is not a de Polignac number, because 20145455153 - 2² = 20145455149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20145455159) 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, 67602050 + ... + 67602347.

It is an arithmetic number, because the mean of its divisors is an integer number (5070164925).

Almost surely, 2^20145455153 is an apocalyptic number.

It is an amenable number.

20145455153 is a deficient number, since it is larger than the sum of its proper divisors (135204547).

20145455153 is a wasteful number, since it uses less digits than its factorization.

20145455153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135204546.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 20145455153 in words is "twenty billion, one hundred forty-five million, four hundred fifty-five thousand, one hundred fifty-three".