20425007149 has 2 divisors, whose sum is σ = 20425007150. Its totient is φ = 20425007148.

The previous prime is 20425007117. The next prime is 20425007167. The reversal of 20425007149 is 94170052402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11723475625 + 8701531524 = 108275^2 + 93282^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425007149 - 2⁵ = 20425007117 is a prime.

It is a super-2 number, since 2×20425007149² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20425007249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212503574 + 10212503575.

It is an arithmetic number, because the mean of its divisors is an integer number (10212503575).

Almost surely, 2^20425007149 is an apocalyptic number.

It is an amenable number.

20425007149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425007149 is an equidigital number, since it uses as much as digits as its factorization.

20425007149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 20425007149 in words is "twenty billion, four hundred twenty-five million, seven thousand, one hundred forty-nine".