20021100010 has 32 divisors (see below), whose sum is σ = 36322566912. Its totient is φ = 7945354560.

The previous prime is 20021099981. The next prime is 20021100019. The reversal of 20021100010 is 1000112002.

It is a super-2 number, since 2×20021100010² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20021099966 and 20021100002.

It is not an unprimeable number, because it can be changed into a prime (20021100019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1062975 + ... + 1081645.

It is an arithmetic number, because the mean of its divisors is an integer number (1135080216).

Almost surely, 2^20021100010 is an apocalyptic number.

20021100010 is a deficient number, since it is larger than the sum of its proper divisors (16301466902).

20021100010 is a wasteful number, since it uses less digits than its factorization.

20021100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19518.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20021100010 its reverse (1000112002), we get a palindrome (21021212012).

The spelling of 20021100010 in words is "twenty billion, twenty-one million, one hundred thousand, ten".