20004264649 has 2 divisors, whose sum is σ = 20004264650. Its totient is φ = 20004264648.

The previous prime is 20004264607. The next prime is 20004264659. The reversal of 20004264649 is 94646240002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10926939024 + 9077325625 = 104532^2 + 95275^2 .

It is a cyclic number.

It is not a de Polignac number, because 20004264649 - 2²⁵ = 19970710217 is a prime.

It is not a weakly prime, because it can be changed into another prime (20004264659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10002132324 + 10002132325.

It is an arithmetic number, because the mean of its divisors is an integer number (10002132325).

Almost surely, 2^20004264649 is an apocalyptic number.

It is an amenable number.

20004264649 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004264649 is an equidigital number, since it uses as much as digits as its factorization.

20004264649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 20004264649 in words is "twenty billion, four million, two hundred sixty-four thousand, six hundred forty-nine".