40202042420 has 96 divisors (see below), whose sum is σ = 87528494592. Its totient is φ = 15500160000.

The previous prime is 40202042407. The next prime is 40202042423. The reversal of 40202042420 is 2424020204.

40202042420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 40202042392 and 40202042401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40202042423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29110130 + ... + 29111510.

It is an arithmetic number, because the mean of its divisors is an integer number (911755152).

Almost surely, 2^40202042420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40202042420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43764247296).

40202042420 is an abundant number, since it is smaller than the sum of its proper divisors (47326452172).

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

40202042420 is a wasteful number, since it uses less digits than its factorization.

40202042420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

Adding to 40202042420 its reverse (2424020204), we get a palindrome (42626062624).

The spelling of 40202042420 in words is "forty billion, two hundred two million, forty-two thousand, four hundred twenty".