20404432153 has 4 divisors (see below), whose sum is σ = 23319351040. Its totient is φ = 17489513268.

The previous prime is 20404432151. The next prime is 20404432163. The reversal of 20404432153 is 35123440402.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35123440402 = 2 ⋅17561720201.

It is a cyclic number.

It is not a de Polignac number, because 20404432153 - 2¹ = 20404432151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20404432151) 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, 1457459433 + ... + 1457459446.

It is an arithmetic number, because the mean of its divisors is an integer number (5829837760).

Almost surely, 2^20404432153 is an apocalyptic number.

It is an amenable number.

20404432153 is a deficient number, since it is larger than the sum of its proper divisors (2914918887).

20404432153 is an equidigital number, since it uses as much as digits as its factorization.

20404432153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914918886.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20404432153 its reverse (35123440402), we get a palindrome (55527872555).

The spelling of 20404432153 in words is "twenty billion, four hundred four million, four hundred thirty-two thousand, one hundred fifty-three".