20251142513 has 8 divisors (see below), whose sum is σ = 23145140928. Its totient is φ = 17357388624.

The previous prime is 20251142501. The next prime is 20251142519. The reversal of 20251142513 is 31524115202.

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

It is a cyclic number.

It is not a de Polignac number, because 20251142513 - 2³⁰ = 19177400689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20251142519) 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, 179495 + ... + 269667.

It is an arithmetic number, because the mean of its divisors is an integer number (2893142616).

Almost surely, 2^20251142513 is an apocalyptic number.

It is an amenable number.

20251142513 is a deficient number, since it is larger than the sum of its proper divisors (2893998415).

20251142513 is an equidigital number, since it uses as much as digits as its factorization.

20251142513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122263.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 20251142513 its reverse (31524115202), we get a palindrome (51775257715).

The spelling of 20251142513 in words is "twenty billion, two hundred fifty-one million, one hundred forty-two thousand, five hundred thirteen".