20251151516423 has 4 divisors (see below), whose sum is σ = 20267365410000. Its totient is φ = 20234937622848.

The previous prime is 20251151516381. The next prime is 20251151516509. The reversal of 20251151516423 is 32461515115202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20251151516423 - 2¹² = 20251151512327 is a prime.

It is a super-2 number, since 2×20251151516423² (a number of 27 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 (20251151516023) 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, 8106944915 + ... + 8106947412.

It is an arithmetic number, because the mean of its divisors is an integer number (5066841352500).

Almost surely, 2^{20251151516423} is an apocalyptic number.

20251151516423 is a deficient number, since it is larger than the sum of its proper divisors (16213893577).

20251151516423 is a wasteful number, since it uses less digits than its factorization.

20251151516423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16213893576.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 20251151516423 in words is "twenty trillion, two hundred fifty-one billion, one hundred fifty-one million, five hundred sixteen thousand, four hundred twenty-three".