23420100 has 144 divisors (see below), whose sum is σ = 75995136. Its totient is φ = 5520000.

The previous prime is 23420087. The next prime is 23420107. The reversal of 23420100 is 102432.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (23420107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 155025 + ... + 155175.

It is an arithmetic number, because the mean of its divisors is an integer number (527744).

Almost surely, 2^23420100 is an apocalyptic number.

23420100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23420100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37997568).

23420100 is an abundant number, since it is smaller than the sum of its proper divisors (52575036).

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

23420100 is a wasteful number, since it uses less digits than its factorization.

23420100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 23420100 is about 4839.4317848276. The cubic root of 23420100 is about 286.1077234511.

Adding to 23420100 its reverse (102432), we get a palindrome (23522532).

The spelling of 23420100 in words is "twenty-three million, four hundred twenty thousand, one hundred".