20420022242040 has 64 divisors (see below), whose sum is σ = 61866602076960. Its totient is φ = 5391425011200.

The previous prime is 20420022241981. The next prime is 20420022242077. The reversal of 20420022242040 is 4024222002402.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 20420022242040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 842398039 + ... + 842422278.

Almost surely, 2^{20420022242040} is an apocalyptic number.

20420022242040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420022242040 is an abundant number, since it is smaller than the sum of its proper divisors (41446579834920).

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

20420022242040 is a wasteful number, since it uses less digits than its factorization.

20420022242040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684820432 (or 1684820428 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20420022242040 its reverse (4024222002402), we get a palindrome (24444244244442).

The spelling of 20420022242040 in words is "twenty trillion, four hundred twenty billion, twenty-two million, two hundred forty-two thousand, forty".