20210001020 has 48 divisors (see below), whose sum is σ = 46757735136. Its totient is φ = 7276320000.

The previous prime is 20210001011. The next prime is 20210001061. The reversal of 20210001020 is 2010001202.

It is a junction number, because it is equal to n+sod(n) for n = 20210000989 and 20210001007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432551 + ... + 476990.

It is an arithmetic number, because the mean of its divisors is an integer number (974119482).

Almost surely, 2^20210001020 is an apocalyptic number.

20210001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210001020 is an abundant number, since it is smaller than the sum of its proper divisors (26547734116).

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

20210001020 is a wasteful number, since it uses less digits than its factorization.

20210001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909662 (or 909660 counting only the distinct ones).

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

Adding to 20210001020 its reverse (2010001202), we get a palindrome (22220002222).

The spelling of 20210001020 in words is "twenty billion, two hundred ten million, one thousand, twenty".