420342023020440 has 32 divisors (see below), whose sum is σ = 1261026069061680. Its totient is φ = 112091206138752.

The previous prime is 420342023020331. The next prime is 420342023020561. The reversal of 420342023020440 is 44020320243024.

It is a super-2 number, since 2×420342023020440² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 420342023020398 and 420342023020407.

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, 1751425095799 + ... + 1751425096038.

Almost surely, 2^{420342023020440} is an apocalyptic number.

420342023020440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420342023020440 is an abundant number, since it is smaller than the sum of its proper divisors (840684046041240).

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

420342023020440 is a wasteful number, since it uses less digits than its factorization.

420342023020440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502850191851 (or 3502850191847 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 30.

Adding to 420342023020440 its reverse (44020320243024), we get a palindrome (464362343263464).

The spelling of 420342023020440 in words is "four hundred twenty trillion, three hundred forty-two billion, twenty-three million, twenty thousand, four hundred forty".