20152453251 has 64 divisors (see below), whose sum is σ = 31901506560. Its totient is φ = 11079045120.

The previous prime is 20152453241. The next prime is 20152453273. The reversal of 20152453251 is 15235425102.

It is not a de Polignac number, because 20152453251 - 2⁶ = 20152453187 is a prime.

It is a super-2 number, since 2×20152453251² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20152453241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12975691 + ... + 12977243.

It is an arithmetic number, because the mean of its divisors is an integer number (498461040).

Almost surely, 2^20152453251 is an apocalyptic number.

20152453251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20152453251 is a deficient number, since it is larger than the sum of its proper divisors (11749053309).

20152453251 is a wasteful number, since it uses less digits than its factorization.

20152453251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836.

The product of its (nonzero) digits is 12000, while the sum is 30.

Adding to 20152453251 its reverse (15235425102), we get a palindrome (35387878353).

The spelling of 20152453251 in words is "twenty billion, one hundred fifty-two million, four hundred fifty-three thousand, two hundred fifty-one".