423040120020 has 144 divisors (see below), whose sum is σ = 1466699794560. Its totient is φ = 96684288768.

The previous prime is 423040120003. The next prime is 423040120037. The reversal of 423040120020 is 20021040324.

423040120020 is a `hidden beast` number, since 42 + 3 + 0 + 401 + 200 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (423040120003) and next prime (423040120037).

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 = 423040119975 and 423040120002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21111366 + ... + 21131394.

It is an arithmetic number, because the mean of its divisors is an integer number (10185415240).

Almost surely, 2^423040120020 is an apocalyptic number.

It is an amenable number.

423040120020 is an abundant number, since it is smaller than the sum of its proper divisors (1043659674540).

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

423040120020 is a wasteful number, since it uses less digits than its factorization.

423040120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36814 (or 36809 counting only the distinct ones).

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

Adding to 423040120020 its reverse (20021040324), we get a palindrome (443061160344).

The spelling of 423040120020 in words is "four hundred twenty-three billion, forty million, one hundred twenty thousand, twenty".