20523103153 has 4 divisors (see below), whose sum is σ = 23454975040. Its totient is φ = 17591231268.

The previous prime is 20523103147. The next prime is 20523103157. The reversal of 20523103153 is 35130132502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20523103153 - 2⁵ = 20523103121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20523103157) 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, 1465935933 + ... + 1465935946.

It is an arithmetic number, because the mean of its divisors is an integer number (5863743760).

Almost surely, 2^20523103153 is an apocalyptic number.

It is an amenable number.

20523103153 is a deficient number, since it is larger than the sum of its proper divisors (2931871887).

20523103153 is an equidigital number, since it uses as much as digits as its factorization.

20523103153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931871886.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 20523103153 its reverse (35130132502), we get a palindrome (55653235655).

The spelling of 20523103153 in words is "twenty billion, five hundred twenty-three million, one hundred three thousand, one hundred fifty-three".