20525215015 has 32 divisors (see below), whose sum is σ = 25652712960. Its totient is φ = 15746640000.

The previous prime is 20525214991. The next prime is 20525215021. The reversal of 20525215015 is 51051252502.

It is not a de Polignac number, because 20525215015 - 2⁷ = 20525214887 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19907550 + ... + 19908580.

It is an arithmetic number, because the mean of its divisors is an integer number (801647280).

Almost surely, 2^20525215015 is an apocalyptic number.

20525215015 is a deficient number, since it is larger than the sum of its proper divisors (5127497945).

20525215015 is a wasteful number, since it uses less digits than its factorization.

20525215015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1863.

The product of its (nonzero) digits is 5000, while the sum is 28.

Adding to 20525215015 its reverse (51051252502), we get a palindrome (71576467517).

The spelling of 20525215015 in words is "twenty billion, five hundred twenty-five million, two hundred fifteen thousand, fifteen".