40001820020 has 24 divisors (see below), whose sum is σ = 84257623968. Its totient is φ = 15952384800.

The previous prime is 40001820007. The next prime is 40001820043. The reversal of 40001820020 is 2002810004.

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, 3014666 + ... + 3027905.

It is an arithmetic number, because the mean of its divisors is an integer number (3510734332).

Almost surely, 2^40001820020 is an apocalyptic number.

It is an amenable number.

40001820020 is an abundant number, since it is smaller than the sum of its proper divisors (44255803948).

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

40001820020 is a wasteful number, since it uses less digits than its factorization.

40001820020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042911 (or 6042909 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The spelling of 40001820020 in words is "forty billion, one million, eight hundred twenty thousand, twenty".