20123252351 has 8 divisors (see below), whose sum is σ = 20352222000. Its totient is φ = 19894346560.

The previous prime is 20123252323. The next prime is 20123252381. The reversal of 20123252351 is 15325232102.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123252351 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20123252351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123252381) 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, 940925 + ... + 962073.

It is an arithmetic number, because the mean of its divisors is an integer number (2544027750).

Almost surely, 2^20123252351 is an apocalyptic number.

20123252351 is a deficient number, since it is larger than the sum of its proper divisors (228969649).

20123252351 is a wasteful number, since it uses less digits than its factorization.

20123252351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31929.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20123252351 its reverse (15325232102), we get a palindrome (35448484453).

The spelling of 20123252351 in words is "twenty billion, one hundred twenty-three million, two hundred fifty-two thousand, three hundred fifty-one".