23420433420 has 48 divisors (see below), whose sum is σ = 72863572320. Its totient is φ = 6245448768.

The previous prime is 23420433359. The next prime is 23420433427. The reversal of 23420433420 is 2433402432.

23420433420 is a `hidden beast` number, since 2 + 3 + 4 + 204 + 33 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23420433427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21685047 + ... + 21686126.

It is an arithmetic number, because the mean of its divisors is an integer number (1517991090).

Almost surely, 2^23420433420 is an apocalyptic number.

23420433420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23420433420 is an abundant number, since it is smaller than the sum of its proper divisors (49443138900).

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

23420433420 is a wasteful number, since it uses less digits than its factorization.

23420433420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43371191 (or 43371183 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 23420433420 its reverse (2433402432), we get a palindrome (25853835852).

The spelling of 23420433420 in words is "twenty-three billion, four hundred twenty million, four hundred thirty-three thousand, four hundred twenty".