10021300020 has 48 divisors (see below), whose sum is σ = 31177379520. Its totient is φ = 2672346528.

The previous prime is 10021300019. The next prime is 10021300087. The reversal of 10021300020 is 2000312001.

It is a happy number.

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 = 10021299975 and 10021300011.

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, 9278442 + ... + 9279521.

It is an arithmetic number, because the mean of its divisors is an integer number (649528740).

Almost surely, 2^10021300020 is an apocalyptic number.

10021300020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021300020 is an abundant number, since it is smaller than the sum of its proper divisors (21156079500).

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

10021300020 is a wasteful number, since it uses less digits than its factorization.

10021300020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18557981 (or 18557973 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 10021300020 its reverse (2000312001), we get a palindrome (12021612021).

The spelling of 10021300020 in words is "ten billion, twenty-one million, three hundred thousand, twenty".