20110001020 has 24 divisors (see below), whose sum is σ = 42234364368. Its totient is φ = 8043360000.

The previous prime is 20110001011. The next prime is 20110001039. The reversal of 20110001020 is 2010001102.

It is a junction number, because it is equal to n+sod(n) for n = 20110000994 and 20110001012.

It is a congruent number.

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, 279795 + ... + 344245.

It is an arithmetic number, because the mean of its divisors is an integer number (1759765182).

Almost surely, 2^20110001020 is an apocalyptic number.

20110001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20110001020 is an abundant number, since it is smaller than the sum of its proper divisors (22124363348).

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

20110001020 is a wasteful number, since it uses less digits than its factorization.

20110001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80061 (or 80059 counting only the distinct ones).

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

Adding to 20110001020 its reverse (2010001102), we get a palindrome (22120002122).

The spelling of 20110001020 in words is "twenty billion, one hundred ten million, one thousand, twenty".