20201021010 has 48 divisors (see below), whose sum is σ = 52578690840. Its totient is φ = 5381191680.

The previous prime is 20201020969. The next prime is 20201021021. The reversal of 20201021010 is 1012010202.

It can be written as a sum of positive squares in 4 ways, for example, as 17154974529 + 3046046481 = 130977^2 + 55191^2 .

It is a super-2 number, since 2×20201021010² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20201020983 and 20201021001.

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, 34575 + ... + 203954.

Almost surely, 2^20201021010 is an apocalyptic number.

20201021010 is an abundant number, since it is smaller than the sum of its proper divisors (32377669830).

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

20201021010 is a wasteful number, since it uses less digits than its factorization.

20201021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239483 (or 239480 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20201021010 its reverse (1012010202), we get a palindrome (21213031212).

The spelling of 20201021010 in words is "twenty billion, two hundred one million, twenty-one thousand, ten".