20011022010 has 48 divisors (see below), whose sum is σ = 59461324416. Its totient is φ = 4573947744.

The previous prime is 20011021991. The next prime is 20011022039. The reversal of 20011022010 is 1022011002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20011021983 and 20011022001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15881134 + ... + 15882393.

It is an arithmetic number, because the mean of its divisors is an integer number (1238777592).

Almost surely, 2^20011022010 is an apocalyptic number.

20011022010 is an abundant number, since it is smaller than the sum of its proper divisors (39450302406).

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

20011022010 is a wasteful number, since it uses less digits than its factorization.

20011022010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31763547 (or 31763544 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20011022010 its reverse (1022011002), we get a palindrome (21033033012).

The spelling of 20011022010 in words is "twenty billion, eleven million, twenty-two thousand, ten".