2100423420 has 96 divisors (see below), whose sum is σ = 6673766400. Its totient is φ = 548188992.

The previous prime is 2100423361. The next prime is 2100423421. The reversal of 2100423420 is 243240012.

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 = 2100423393 and 2100423402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100423421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16000 + ... + 66759.

It is an arithmetic number, because the mean of its divisors is an integer number (69518400).

Almost surely, 2^2100423420 is an apocalyptic number.

2100423420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100423420 is an abundant number, since it is smaller than the sum of its proper divisors (4573342980).

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

2100423420 is a wasteful number, since it uses less digits than its factorization.

2100423420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82824 (or 82816 counting only the distinct ones).

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

The square root of 2100423420 is about 45830.3766076606. The cubic root of 2100423420 is about 1280.6652263195.

Adding to 2100423420 its reverse (243240012), we get a palindrome (2343663432).

The spelling of 2100423420 in words is "two billion, one hundred million, four hundred twenty-three thousand, four hundred twenty".