20021010000 has 100 divisors (see below), whose sum is σ = 64630586592. Its totient is φ = 5338928000.

The previous prime is 20021009999. The next prime is 20021010029. The reversal of 20021010000 is 1012002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (6).

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 19 ways as a sum of consecutive naturals, for example, 303684 + ... + 363683.

Almost surely, 2^20021010000 is an apocalyptic number.

20021010000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021010000 is an abundant number, since it is smaller than the sum of its proper divisors (44609576592).

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

20021010000 is an equidigital number, since it uses as much as digits as its factorization.

20021010000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667398 (or 667377 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 20021010000 its reverse (1012002), we get a palindrome (20022022002).

The spelling of 20021010000 in words is "twenty billion, twenty-one million, ten thousand".