40020101020 has 24 divisors (see below), whose sum is σ = 84058657200. Its totient is φ = 16004908032.

The previous prime is 40020100999. The next prime is 40020101027. The reversal of 40020101020 is 2010102004.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 40020100988 and 40020101006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020101027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89605 + ... + 296764.

It is an arithmetic number, because the mean of its divisors is an integer number (3502444050).

Almost surely, 2^40020101020 is an apocalyptic number.

It is an amenable number.

40020101020 is an abundant number, since it is smaller than the sum of its proper divisors (44038556180).

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

40020101020 is a wasteful number, since it uses less digits than its factorization.

40020101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391557 (or 391555 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 40020101020 its reverse (2010102004), we get a palindrome (42030203024).

The spelling of 40020101020 in words is "forty billion, twenty million, one hundred one thousand, twenty".