11421032420 has 48 divisors (see below), whose sum is σ = 27499866240. Its totient is φ = 3903012864.

The previous prime is 11421032419. The next prime is 11421032437. The reversal of 11421032420 is 2423012411.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11421032392 and 11421032401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89885 + ... + 175844.

It is an arithmetic number, because the mean of its divisors is an integer number (572913880).

Almost surely, 2^11421032420 is an apocalyptic number.

11421032420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11421032420 is an abundant number, since it is smaller than the sum of its proper divisors (16078833820).

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

11421032420 is a wasteful number, since it uses less digits than its factorization.

11421032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266052 (or 266050 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 11421032420 its reverse (2423012411), we get a palindrome (13844044831).

The spelling of 11421032420 in words is "eleven billion, four hundred twenty-one million, thirty-two thousand, four hundred twenty".