20200110021 has 32 divisors (see below), whose sum is σ = 36832113920. Its totient is φ = 10655001792.

The previous prime is 20200110017. The next prime is 20200110031. The reversal of 20200110021 is 12001100202.

It is not a de Polignac number, because 20200110021 - 2² = 20200110017 is a prime.

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 = 20200109985 and 20200110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200110001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4108270 + ... + 4113183.

It is an arithmetic number, because the mean of its divisors is an integer number (1151003560).

Almost surely, 2^20200110021 is an apocalyptic number.

20200110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20200110021 is a deficient number, since it is larger than the sum of its proper divisors (16632003899).

20200110021 is a wasteful number, since it uses less digits than its factorization.

20200110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8221482 (or 8221476 counting only the distinct ones).

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

Adding to 20200110021 its reverse (12001100202), we get a palindrome (32201210223).

The spelling of 20200110021 in words is "twenty billion, two hundred million, one hundred ten thousand, twenty-one".