20525111293 has 2 divisors, whose sum is σ = 20525111294. Its totient is φ = 20525111292.

The previous prime is 20525111287. The next prime is 20525111351. The reversal of 20525111293 is 39211152502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14693803524 + 5831307769 = 121218^2 + 76363^2 .

It is a cyclic number.

It is not a de Polignac number, because 20525111293 - 2⁵ = 20525111261 is a prime.

It is a super-2 number, since 2×20525111293² (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 (20525111263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262555646 + 10262555647.

It is an arithmetic number, because the mean of its divisors is an integer number (10262555647).

Almost surely, 2^20525111293 is an apocalyptic number.

It is an amenable number.

20525111293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20525111293 is an equidigital number, since it uses as much as digits as its factorization.

20525111293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 31.

Adding to 20525111293 its reverse (39211152502), we get a palindrome (59736263795).

The spelling of 20525111293 in words is "twenty billion, five hundred twenty-five million, one hundred eleven thousand, two hundred ninety-three".