20004357167251 has 4 divisors (see below), whose sum is σ = 20229125225400. Its totient is φ = 19779589109104.

The previous prime is 20004357167231. The next prime is 20004357167293. The reversal of 20004357167251 is 15276175340002.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20004357167251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20004357167198 and 20004357167207.

It is not an unprimeable number, because it can be changed into a prime (20004357167231) 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, 112384028941 + ... + 112384029118.

It is an arithmetic number, because the mean of its divisors is an integer number (5057281306350).

Almost surely, 2^{20004357167251} is an apocalyptic number.

20004357167251 is a deficient number, since it is larger than the sum of its proper divisors (224768058149).

20004357167251 is an equidigital number, since it uses as much as digits as its factorization.

20004357167251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224768058148.

The product of its (nonzero) digits is 352800, while the sum is 43.

The spelling of 20004357167251 in words is "twenty trillion, four billion, three hundred fifty-seven million, one hundred sixty-seven thousand, two hundred fifty-one".