10000020 has 24 divisors (see below), whose sum is σ = 28000224. Its totient is φ = 2666656.

The previous prime is 10000019. The next prime is 10000079. The reversal of 10000020 is 2000001.

It is a Harshad number since it is a multiple of its sum of digits (3).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83274 + ... + 83393.

It is an arithmetic number, because the mean of its divisors is an integer number (1166676).

Almost surely, 2^10000020 is an apocalyptic number.

10000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10000020 is an abundant number, since it is smaller than the sum of its proper divisors (18000204).

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

10000020 is a wasteful number, since it uses less digits than its factorization.

10000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166679 (or 166677 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 3.

The square root of 10000020 is about 3162.2808224445. The cubic root of 10000020 is about 215.4436126321.

Adding to 10000020 its reverse (2000001), we get a palindrome (12000021).

The spelling of 10000020 in words is "ten million, twenty", and thus it is an aban number and an uban number.