20402261525 has 24 divisors (see below), whose sum is σ = 25635561600. Its totient is φ = 16104816000.

The previous prime is 20402261519. The next prime is 20402261563. The reversal of 20402261525 is 52516220402.

It is not a de Polignac number, because 20402261525 - 2⁶ = 20402261461 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4854425 + ... + 4858625.

It is an arithmetic number, because the mean of its divisors is an integer number (1068148400).

Almost surely, 2^20402261525 is an apocalyptic number.

20402261525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20402261525 is a deficient number, since it is larger than the sum of its proper divisors (5233300075).

20402261525 is a wasteful number, since it uses less digits than its factorization.

20402261525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6749 (or 6744 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 20402261525 its reverse (52516220402), we get a palindrome (72918481927).

The spelling of 20402261525 in words is "twenty billion, four hundred two million, two hundred sixty-one thousand, five hundred twenty-five".