20251323 has 16 divisors (see below), whose sum is σ = 30701440. Its totient is φ = 13186152.

The previous prime is 20251303. The next prime is 20251333. The reversal of 20251323 is 32315202.

It is not a de Polignac number, because 20251323 - 2¹⁰ = 20250299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20251296 and 20251305.

It is not an unprimeable number, because it can be changed into a prime (20251303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7561 + ... + 9882.

It is an arithmetic number, because the mean of its divisors is an integer number (1918840).

Almost surely, 2^20251323 is an apocalyptic number.

20251323 is a deficient number, since it is larger than the sum of its proper divisors (10450117).

20251323 is a wasteful number, since it uses less digits than its factorization.

20251323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17495 (or 17489 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20251323 is about 4500.1469975991. The cubic root of 20251323 is about 272.5740247228.

Adding to 20251323 its reverse (32315202), we get a palindrome (52566525).

The spelling of 20251323 in words is "twenty million, two hundred fifty-one thousand, three hundred twenty-three".