20525210020 has 48 divisors (see below), whose sum is σ = 49274160768. Its totient is φ = 7035264000.

The previous prime is 20525209997. The next prime is 20525210023. The reversal of 20525210020 is 2001252502.

It is a self number, because there is not a number n which added to its sum of digits gives 20525210020.

It is not an unprimeable number, because it can be changed into a prime (20525210023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541819 + ... + 578461.

It is an arithmetic number, because the mean of its divisors is an integer number (1026545016).

Almost surely, 2^20525210020 is an apocalyptic number.

20525210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20525210020 is an abundant number, since it is smaller than the sum of its proper divisors (28748950748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20525210020 is a wasteful number, since it uses less digits than its factorization.

20525210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40660 (or 40658 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 20525210020 its reverse (2001252502), we get a palindrome (22526462522).

The spelling of 20525210020 in words is "twenty billion, five hundred twenty-five million, two hundred ten thousand, twenty".