40211220020 has 24 divisors (see below), whose sum is σ = 85314118344. Its totient is φ = 15918667776.

The previous prime is 40211220001. The next prime is 40211220037. The reversal of 40211220020 is 2002211204.

It can be written as a sum of positive squares in 4 ways, for example, as 20593444 + 40190626576 = 4538^2 + 200476^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40211219977 and 40211220004.

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, 10361777 + ... + 10365656.

It is an arithmetic number, because the mean of its divisors is an integer number (3554754931).

Almost surely, 2^40211220020 is an apocalyptic number.

It is an amenable number.

40211220020 is an abundant number, since it is smaller than the sum of its proper divisors (45102898324).

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

40211220020 is a wasteful number, since it uses less digits than its factorization.

40211220020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20727539 (or 20727537 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 40211220020 its reverse (2002211204), we get a palindrome (42213431224).

The spelling of 40211220020 in words is "forty billion, two hundred eleven million, two hundred twenty thousand, twenty".