20416125553251 has 4 divisors (see below), whose sum is σ = 27221500737672. Its totient is φ = 13610750368832.

The previous prime is 20416125553237. The next prime is 20416125553253. The reversal of 20416125553251 is 15235552161402.

It is a happy number.

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 20416125553251 - 2⁷ = 20416125553123 is a prime.

It is a super-2 number, since 2×20416125553251² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20416125553253) 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, 3402687592206 + ... + 3402687592211.

It is an arithmetic number, because the mean of its divisors is an integer number (6805375184418).

Almost surely, 2^{20416125553251} is an apocalyptic number.

20416125553251 is a deficient number, since it is larger than the sum of its proper divisors (6805375184421).

20416125553251 is an equidigital number, since it uses as much as digits as its factorization.

20416125553251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805375184420.

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 20416125553251 in words is "twenty trillion, four hundred sixteen billion, one hundred twenty-five million, five hundred fifty-three thousand, two hundred fifty-one".