20425007249 has 2 divisors, whose sum is σ = 20425007250. Its totient is φ = 20425007248.

The previous prime is 20425007227. The next prime is 20425007279. The reversal of 20425007249 is 94270052402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20307675025 + 117332224 = 142505^2 + 10832^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425007249 - 2²⁴ = 20408230033 is a prime.

It is a super-2 number, since 2×20425007249² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20425007209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212503624 + 10212503625.

It is an arithmetic number, because the mean of its divisors is an integer number (10212503625).

Almost surely, 2^20425007249 is an apocalyptic number.

It is an amenable number.

20425007249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425007249 is an equidigital number, since it uses as much as digits as its factorization.

20425007249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 20425007249 in words is "twenty billion, four hundred twenty-five million, seven thousand, two hundred forty-nine".