20531051025 has 24 divisors (see below), whose sum is σ = 33949847904. Its totient is φ = 10948224000.

The previous prime is 20531050987. The next prime is 20531051059. The reversal of 20531051025 is 52015013502.

It is a happy number.

It is not a de Polignac number, because 20531051025 - 2⁶ = 20531050961 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20531050986 and 20531051004.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 594225 + ... + 627825.

It is an arithmetic number, because the mean of its divisors is an integer number (1414576996).

Almost surely, 2^20531051025 is an apocalyptic number.

20531051025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20531051025 is a deficient number, since it is larger than the sum of its proper divisors (13418796879).

20531051025 is a wasteful number, since it uses less digits than its factorization.

20531051025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41761 (or 41756 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 20531051025 its reverse (52015013502), we get a palindrome (72546064527).

The spelling of 20531051025 in words is "twenty billion, five hundred thirty-one million, fifty-one thousand, twenty-five".