20010021010 has 32 divisors (see below), whose sum is σ = 41777861760. Its totient is φ = 6758180352.

The previous prime is 20010021001. The next prime is 20010021043. The reversal of 20010021010 is 1012001002.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a junction number, because it is equal to n+sod(n) for n = 20010020984 and 20010021002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2128575 + ... + 2137954.

It is an arithmetic number, because the mean of its divisors is an integer number (1305558180).

Almost surely, 2^20010021010 is an apocalyptic number.

20010021010 is an abundant number, since it is smaller than the sum of its proper divisors (21767840750).

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

20010021010 is a wasteful number, since it uses less digits than its factorization.

20010021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4266610.

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

Adding to 20010021010 its reverse (1012001002), we get a palindrome (21022022012).

The spelling of 20010021010 in words is "twenty billion, ten million, twenty-one thousand, ten".