20152312423 has 4 divisors (see below), whose sum is σ = 20157997480. Its totient is φ = 20146627368.

The previous prime is 20152312417. The next prime is 20152312451. The reversal of 20152312423 is 32421325102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32421325102 = 2 ⋅16210662551.

It is a cyclic number.

It is not a de Polignac number, because 20152312423 - 2⁵ = 20152312391 is a prime.

It is a super-2 number, since 2×20152312423² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152312463) 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, 2837208 + ... + 2844301.

It is an arithmetic number, because the mean of its divisors is an integer number (5039499370).

Almost surely, 2^20152312423 is an apocalyptic number.

20152312423 is a deficient number, since it is larger than the sum of its proper divisors (5685057).

20152312423 is an equidigital number, since it uses as much as digits as its factorization.

20152312423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5685056.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20152312423 its reverse (32421325102), we get a palindrome (52573637525).

The spelling of 20152312423 in words is "twenty billion, one hundred fifty-two million, three hundred twelve thousand, four hundred twenty-three".