23403520155451 has 8 divisors (see below), whose sum is σ = 24781575808080. Its totient is φ = 22025617613568.

The previous prime is 23403520155377. The next prime is 23403520155469. The reversal of 23403520155451 is 15455102530432.

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

It is not a de Polignac number, because 23403520155451 - 2³³ = 23394930220859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23403520153451) 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, 37962906 + ... + 38574463.

It is an arithmetic number, because the mean of its divisors is an integer number (3097696976010).

Almost surely, 2^{23403520155451} is an apocalyptic number.

23403520155451 is a deficient number, since it is larger than the sum of its proper divisors (1378055652629).

23403520155451 is a wasteful number, since it uses less digits than its factorization.

23403520155451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76555373.

The product of its (nonzero) digits is 360000, while the sum is 40.

Adding to 23403520155451 its reverse (15455102530432), we get a palindrome (38858622685883).

The spelling of 23403520155451 in words is "twenty-three trillion, four hundred three billion, five hundred twenty million, one hundred fifty-five thousand, four hundred fifty-one".