20021001010 has 16 divisors (see below), whose sum is σ = 36040375872. Its totient is φ = 8007828400.

The previous prime is 20021000981. The next prime is 20021001029. The reversal of 20021001010 is 1010012002.

It is a junction number, because it is equal to n+sod(n) for n = 20021000984 and 20021001002.

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, 93675 + ... + 220945.

It is an arithmetic number, because the mean of its divisors is an integer number (2252523492).

Almost surely, 2^20021001010 is an apocalyptic number.

20021001010 is a deficient number, since it is larger than the sum of its proper divisors (16019374862).

20021001010 is a wasteful number, since it uses less digits than its factorization.

20021001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143009.

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

Adding to 20021001010 its reverse (1010012002), we get a palindrome (21031013012).

The spelling of 20021001010 in words is "twenty billion, twenty-one million, one thousand, ten".