20425333531 has 2 divisors, whose sum is σ = 20425333532. Its totient is φ = 20425333530.

The previous prime is 20425333501. The next prime is 20425333549. The reversal of 20425333531 is 13533352402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20425333531 - 2¹¹ = 20425331483 is a prime.

It is a super-2 number, since 2×20425333531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20425333493 and 20425333502.

It is not a weakly prime, because it can be changed into another prime (20425333501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212666765 + 10212666766.

It is an arithmetic number, because the mean of its divisors is an integer number (10212666766).

Almost surely, 2^20425333531 is an apocalyptic number.

20425333531 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425333531 is an equidigital number, since it uses as much as digits as its factorization.

20425333531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 20425333531 its reverse (13533352402), we get a palindrome (33958685933).

The spelling of 20425333531 in words is "twenty billion, four hundred twenty-five million, three hundred thirty-three thousand, five hundred thirty-one".