40043021220 has 96 divisors (see below), whose sum is σ = 124621002240. Its totient is φ = 10674478080.

The previous prime is 40043021209. The next prime is 40043021233. The reversal of 40043021220 is 2212034004.

40043021220 is a `hidden beast` number, since 4 + 0 + 0 + 430 + 212 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 40043021193 and 40043021202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1803909 + ... + 1825971.

It is an arithmetic number, because the mean of its divisors is an integer number (1298135440).

Almost surely, 2^40043021220 is an apocalyptic number.

It is an amenable number.

40043021220 is an abundant number, since it is smaller than the sum of its proper divisors (84577981020).

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

40043021220 is a wasteful number, since it uses less digits than its factorization.

40043021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25442 (or 25434 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 40043021220 its reverse (2212034004), we get a palindrome (42255055224).

The spelling of 40043021220 in words is "forty billion, forty-three million, twenty-one thousand, two hundred twenty".