10021525220 has 24 divisors (see below), whose sum is σ = 24051660864. Its totient is φ = 3435951456.

The previous prime is 10021525219. The next prime is 10021525229. The reversal of 10021525220 is 2252512001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 10021525192 and 10021525201.

It is not an unprimeable number, because it can be changed into a prime (10021525229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35791022 + ... + 35791301.

It is an arithmetic number, because the mean of its divisors is an integer number (1002152536).

Almost surely, 2^10021525220 is an apocalyptic number.

10021525220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021525220 is an abundant number, since it is smaller than the sum of its proper divisors (14030135644).

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

10021525220 is a wasteful number, since it uses less digits than its factorization.

10021525220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71582339 (or 71582337 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The spelling of 10021525220 in words is "ten billion, twenty-one million, five hundred twenty-five thousand, two hundred twenty".