25220003993 has 2 divisors, whose sum is σ = 25220003994. Its totient is φ = 25220003992.

The previous prime is 25220003981. The next prime is 25220004031. The reversal of 25220003993 is 39930002252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19055869849 + 6164134144 = 138043^2 + 78512^2 .

It is a cyclic number.

It is not a de Polignac number, because 25220003993 - 2⁶ = 25220003929 is a prime.

It is not a weakly prime, because it can be changed into another prime (25220003093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12610001996 + 12610001997.

It is an arithmetic number, because the mean of its divisors is an integer number (12610001997).

Almost surely, 2^25220003993 is an apocalyptic number.

It is an amenable number.

25220003993 is a deficient number, since it is larger than the sum of its proper divisors (1).

25220003993 is an equidigital number, since it uses as much as digits as its factorization.

25220003993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 35.

The spelling of 25220003993 in words is "twenty-five billion, two hundred twenty million, three thousand, nine hundred ninety-three".